🔥 查詢語句 🔥
SELECT column_name1,column_name2 FROM table_name
[WHERE where_condition]
[GROUP BY {col_name | expr | position}] , ... [WITH ROLLUP]]
[WHERE where_condition]
[ORDER BY {col_name | expr | postion} [ASC | DESC] , ... [WITH ROLLUP]]
[LIMIT {[offset,] row_count | row_count OFFSET offset}]
show databases;
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
use mysql;
mysql> use mysql;
Database changed show tables;
mysql> show tables;
+------------------------------------------------------+
| Tables_in_mysql |
+------------------------------------------------------+
| columns_priv |
| component |
| db |
| default_roles |
| engine_cost |
| func |
| general_log |
| global_grants |
| gtid_executed |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| innodb_index_stats |
| innodb_table_stats |
| password_history |
| plugin |
| procs_priv |
| proxies_priv |
| replication_asynchronous_connection_failover |
| replication_asynchronous_connection_failover_managed |
| replication_group_configuration_version |
| replication_group_member_actions |
| role_edges |
| server_cost |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+------------------------------------------------------+
37 rows in set (0.00 sec) mysql> select * from help_keyword;
+-----------------+----------------------------------------+
| help_keyword_id | name |
+-----------------+----------------------------------------+
| 108 | % |
| 264 | & |
| 422 | (JSON |
| 86 | * |
| 84 | + |
| 85 | - |
| 423 | -> |
| 425 | ->> |
| 87 | / |
| 75 | := |
| 59 | < |
| 266 | << |
| 58 | <= |
| 56 | <=> |
| 57 | <> |
| 55 | = |
| 61 | > |
| 60 | >= |
| 267 | >> |
| 90 | ABS |
| 879 | ACCOUNT |
| 91 | ACOS |
| 659 | ACTION |
| 49 | ADD |
| 120 | ADDDATE |
| 121 | ADDTIME |
| 913 | ADMIN |
| 270 | AES_DECRYPT |
| 271 | AES_ENCRYPT |
| 581 | AFTER |
| 247 | AGAINST |
| 935 | AGGREGATE |
| 582 | ALGORITHM |
| 721 | ALL |
| 50 | ALTER |
| 583 | ANALYZE |
| 62 | AND |
| 526 | ANY_VALUE |
| 660 | ARCHIVE |
| 254 | ARRAY |
| 722 | AS |
| 464 | ASC |
| 185 | ASCII |
| 92 | ASIN |
| 774 | ASSIGN_GTIDS_TO_ANONYMOUS_TRANSACTIONS |
| 6 | ASYMMETRIC_DECRYPT |
| 7 | ASYMMETRIC_DERIVE |
| 8 | ASYMMETRIC_ENCRYPT |
| 9 | ASYMMETRIC_SIGN |
| 10 | ASYMMETRIC_VERIFY |
| 643 | AT |
| 93 | ATAN |
| 94 | ATAN2 |
| 880 | ATTRIBUTE |
| 911 | AUTHENTICATION |
| 743 | AUTOCOMMIT |
| 584 | AUTOEXTEND_SIZE |
| 585 | AUTO_INCREMENT |
| 458 | AVG |
| 586 | AVG_ROW_LENGTH |
| 755 | BACKUP |
| 769 | BEFORE |
| 744 | BEGIN |
| 288 | BENCHMARK |
| 63 | BETWEEN |
| 186 | BIN |
| 253 | BINARY |
| 563 | BINLOG |
| 527 | BIN_TO_UUID |
| 460 | BIT_AND |
| 269 | BIT_COUNT |
| 187 | BIT_LENGTH |
| 461 | BIT_OR |
| 462 | BIT_XOR |
| 17 | BOOL |
| 18 | BOOLEAN |
| 230 | BOTH |
| 647 | BTREE |
| 465 | BY |
| 42 | BYTE |
| 970 | CACHE |
| 689 | CALL |
| 497 | CAN_ACCESS_COLUMN |
| 498 | CAN_ACCESS_DATABASE |
| 499 | CAN_ACCESS_TABLE |
| 500 | CAN_ACCESS_USER |
| 501 | CAN_ACCESS_VIEW |
| 661 | CASCADE |
| 76 | CASE |
| 255 | CAST |
| 860 | CATALOG_NAME |
| 95 | CEIL |
| 96 | CEILING |
| 745 | CHAIN |
| 881 | CHALLENGE_RESPONSE |
| 587 | CHANGE |
| 564 | CHANNEL |
| 43 | CHAR |
| 39 | CHARACTER |
| 189 | CHARACTER_LENGTH |
| 289 | CHARSET |
| 188 | CHAR_LENGTH |
| 588 | CHECK |
| 589 | CHECKSUM |
| 882 | CIPHER |
| 861 | CLASS_ORIGIN |
| 914 | CLIENT |
| 943 | CLONE |
| 695 | CLOSE |
| 65 | COALESCE |
| 964 | CODE |
| 290 | COERCIBILITY |
| 546 | COLLATE |
| 291 | COLLATION |
| 590 | COLUMN |
| 591 | COLUMNS |
| 862 | COLUMN_NAME |
| 551 | COMMENT |
| 746 | COMMIT |
| 758 | COMMITTED |
| 662 | COMPACT |
| 552 | COMPLETION |
| 939 | COMPONENT |
| 272 | COMPRESS |
| 663 | COMPRESSED |
| 592 | COMPRESSION |
| 190 | CONCAT |
| 191 | CONCAT_WS |
| 708 | CONCURRENT |
| 857 | CONDITION |
| 593 | CONNECTION |
| 292 | CONNECTION_ID |
| 747 | CONSISTENT |
| 594 | CONSTRAINT |
| 863 | CONSTRAINT_CATALOG |
| 864 | CONSTRAINT_NAME |
| 865 | CONSTRAINT_SCHEMA |
| 858 | CONTINUE |
| 97 | CONV |
| 260 | CONVERT |
| 122 | CONVERT_TZ |
| 98 | COS |
| 99 | COT |
| 463 | COUNT |
| 100 | CRC32 |
| 51 | CREATE |
| 11 | CREATE_ASYMMETRIC_PRIV_KEY |
| 12 | CREATE_ASYMMETRIC_PUB_KEY |
| 13 | CREATE_DH_PARAMETERS |
| 14 | CREATE_DIGEST |
| 738 | CROSS |
| 664 | CSV |
| 482 | CUME_DIST |
| 123 | CURDATE |
| 883 | CURRENT |
| 124 | CURRENT_DATE |
| 293 | CURRENT_ROLE |
| 125 | CURRENT_TIME |
| 126 | CURRENT_TIMESTAMP |
| 294 | CURRENT_USER |
| 855 | CURSOR |
| 866 | CURSOR_NAME |
| 127 | CURTIME |
| 595 | DATA |
| 295 | DATABASE |
| 948 | DATABASES |
| 636 | DATAFILE |
| 36 | DATE |
| 128 | DATEDIFF |
| 256 | DATETIME |
| 129 | DATE_ADD |
| 144 | DATE_FORMAT |
| 130 | DATE_SUB |
| 131 | DAY |
| 145 | DAYNAME |
| 146 | DAYOFMONTH |
| 147 | DAYOFWEEK |
| 148 | DAYOFYEAR |
| 132 | DAY_HOUR |
| 133 | DAY_MINUTE |
| 134 | DAY_SECOND |
| 846 | DEALLOCATE |
| 28 | DEC |
| 31 | DECIMAL |
| 847 | DECLARE |
| 2 | DEFAULT |
| 837 | DEFAULT_AUTH |
| 553 | DEFINER |
| 653 | DEFINITION |
| 101 | DEGREES |
| 701 | DELAYED |
| 596 | DELAY_KEY_WRITE |
| 665 | DELETE |
| 483 | DENSE_RANK |
| 466 | DESC |
| 981 | DESCRIBE |
| 654 | DESCRIPTION |
| 867 | DIAGNOSTICS |
| 597 | DIRECTORY |
| 554 | DISABLE |
| 598 | DISCARD |
| 459 | DISTINCT |
| 723 | DISTINCTROW |
| 88 | DIV |
| 555 | DO |
| 599 | DROP |
| 737 | DUAL |
| 724 | DUMPFILE |
| 702 | DUPLICATE |
| 666 | DYNAMIC |
| 77 | ELSE |
| 848 | ELSEIF |
| 192 | ELT |
| 556 | ENABLE |
| 709 | ENCLOSED |
| 547 | ENCRYPTION |
| 78 | END |
| 644 | ENDS |
| 600 | ENGINE |
| 949 | ENGINES |
| 565 | ERROR |
| 950 | ERRORS |
| 239 | ESCAPE |
| 710 | ESCAPED |
| 557 | EVENT |
| 962 | EVENTS |
| 645 | EVERY |
| 926 | EXCEPT |
| 601 | EXCHANGE |
| 845 | EXECUTE |
| 642 | EXISTS |
| 859 | EXIT |
| 102 | EXP |
| 248 | EXPANSION |
| 884 | EXPIRE |
| 982 | EXPLAIN |
| 971 | EXPORT |
| 193 | EXPORT_SET |
| 933 | EXTENDED |
| 682 | EXTENT_SIZE |
| 149 | EXTRACT |
| 424 | EXTRACTION) |
| 261 | EXTRACTVALUE |
| 885 | FACTOR |
| 886 | FAILED_LOGIN_ATTEMPTS |
| 15 | FALSE |
| 931 | FAST |
| 667 | FEDERATED |
| 856 | FETCH |
| 194 | FIELD |
| 711 | FIELDS |
| 915 | FILE |
| 683 | FILE_BLOCK_SIZE |
| 803 | FILTER |
| 195 | FIND_IN_SET |
| 887 | FINISH |
| 602 | FIRST |
| 484 | FIRST_VALUE |
| 29 | FIXED |
| 32 | FLOAT4 |
| 33 | FLOAT8 |
| 103 | FLOOR |
| 972 | FLUSH |
| 566 | FOR |
| 739 | FORCE |
| 603 | FOREIGN |
| 196 | FORMAT |
| 493 | FORMAT_BYTES |
| 494 | FORMAT_PICO_TIME |
| 296 | FOUND_ROWS |
| 231 | FROM |
| 197 | FROM_BASE64 |
| 150 | FROM_DAYS |
| 151 | FROM_UNIXTIME |
| 668 | FULL |
| 604 | FULLTEXT |
| 169 | FUNCTION |
| 973 | GENERAL |
| 336 | GEOMCOLLECTION |
| 337 | GEOMETRYCOLLECTION |
| 868 | GET |
| 502 | GET_DD_COLUMN_PRIVILEGES |
| 503 | GET_DD_CREATE_OPTIONS |
| 504 | GET_DD_INDEX_SUB_PART_LENGTH |
| 152 | GET_FORMAT |
| 283 | GET_LOCK |
| 759 | GLOBAL |
| 916 | GRANT |
| 951 | GRANTS |
| 66 | GREATEST |
| 576 | GROUP |
| 528 | GROUPING |
| 467 | GROUP_CONCAT |
| 454 | GTID_SUBSET |
| 455 | GTID_SUBTRACT |
| 696 | HANDLER |
| 725 | HAVING |
| 669 | HEAP |
| 5 | HELP |
| 0 | HELP_DATE |
| 1 | HELP_VERSION |
| 198 | HEX |
| 703 | HIGH_PRIORITY |
| 888 | HISTORY |
| 648 | HOST |
| 952 | HOSTS |
| 135 | HOUR |
| 136 | HOUR_MINUTE |
| 137 | HOUR_SECOND |
| 297 | ICU_VERSION |
| 719 | IDENTIFIED |
| 81 | IF |
| 82 | IFNULL |
| 704 | IGNORE |
| 775 | IGNORE_SERVER_IDS |
| 605 | IMPORT |
| 67 | IN |
| 52 | INDEX |
| 953 | INDEXES |
| 531 | INET6_ATON |
| 532 | INET6_NTOA |
| 529 | INET_ATON |
| 530 | INET_NTOA |
| 712 | INFILE |
| 912 | INITIAL |
| 637 | INITIAL_SIZE |
| 889 | INITIATE |
| 426 | INLINE |
| 740 | INNER |
| 567 | INNODB |
| 199 | INSERT |
| 606 | INSERT_METHOD |
| 940 | INSTALL |
| 568 | INSTANCE |
| 200 | INSTR |
| 19 | INT1 |
| 22 | INT2 |
| 23 | INT3 |
| 25 | INT4 |
| 27 | INT8 |
| 26 | INTEGER |
| 505 | INTERNAL_AUTO_INCREMENT |
| 506 | INTERNAL_AVG_ROW_LENGTH |
| 508 | INTERNAL_CHECKSUM |
| 507 | INTERNAL_CHECK_TIME |
| 509 | INTERNAL_DATA_FREE |
| 510 | INTERNAL_DATA_LENGTH |
| 511 | INTERNAL_DD_CHAR_LENGTH |
| 512 | INTERNAL_GET_COMMENT_OR_ERROR |
| 513 | INTERNAL_GET_ENABLED_ROLE_JSON |
| 514 | INTERNAL_GET_HOSTNAME |
| 515 | INTERNAL_GET_USERNAME |
| 516 | INTERNAL_GET_VIEW_WARNING_OR_ERROR |
| 517 | INTERNAL_INDEX_COLUMN_CARDINALITY |
| 518 | INTERNAL_INDEX_LENGTH |
| 519 | INTERNAL_IS_ENABLED_ROLE |
| 520 | INTERNAL_IS_MANDATORY_ROLE |
| 521 | INTERNAL_KEYS_DISABLED |
| 522 | INTERNAL_MAX_DATA_LENGTH |
| 523 | INTERNAL_TABLE_ROWS |
| 524 | INTERNAL_UPDATE_TIME |
| 68 | INTERVAL |
| 705 | INTO |
| 607 | INVISIBLE |
| 838 | IO_THREAD |
| 69 | IS |
| 71 | ISNULL |
| 760 | ISOLATION |
| 890 | ISSUER |
| 284 | IS_FREE_LOCK |
| 533 | IS_IPV4 |
| 534 | IS_IPV4_COMPAT |
| 535 | IS_IPV4_MAPPED |
| 536 | IS_IPV6 |
| 285 | IS_USED_LOCK |
| 537 | IS_UUID |
| 525 | IS_VISIBLE_DD_OBJECT |
| 849 | ITERATE |
| 726 | JOIN |
| 257 | JSON |
| 416 | JSON_ARRAY |
| 470 | JSON_ARRAYAGG |
| 434 | JSON_ARRAY_APPEND |
| 435 | JSON_ARRAY_INSERT |
| 419 | JSON_CONTAINS |
| 420 | JSON_CONTAINS_PATH |
| 444 | JSON_DEPTH |
| 421 | JSON_EXTRACT |
| 436 | JSON_INSERT |
| 428 | JSON_KEYS |
| 445 | JSON_LENGTH |
| 437 | JSON_MERGE |
| 438 | JSON_MERGE_PATCH |
| 439 | JSON_MERGE_PRESERVE |
| 417 | JSON_OBJECT |
| 471 | JSON_OBJECTAGG |
| 429 | JSON_OVERLAPS |
| 451 | JSON_PRETTY |
| 418 | JSON_QUOTE |
| 440 | JSON_REMOVE |
| 441 | JSON_REPLACE |
| 449 | JSON_SCHEMA_VALID |
| 450 | JSON_SCHEMA_VALIDATION_REPORT |
| 430 | JSON_SEARCH |
| 442 | JSON_SET |
| 452 | JSON_STORAGE_FREE |
| 453 | JSON_STORAGE_SIZE |
| 448 | JSON_TABLE |
| 446 | JSON_TYPE |
| 443 | JSON_UNQUOTE |
| 447 | JSON_VALID |
| 431 | JSON_VALUE |
| 53 | KEY |
| 569 | KEYRING |
| 608 | KEYS |
| 609 | KEY_BLOCK_SIZE |
| 978 | KILL |
| 485 | LAG |
| 697 | LAST |
| 153 | LAST_DAY |
| 298 | LAST_INSERT_ID |
| 486 | LAST_VALUE |
| 201 | LCASE |
| 487 | LEAD |
| 232 | LEADING |
| 72 | LEAST |
| 850 | LEAVE |
| 979 | LEAVES |
| 202 | LEFT |
| 203 | LENGTH |
| 761 | LEVEL |
| 223 | LIKE |
| 690 | LIMIT |
| 713 | LINES |
| 338 | LINESTRING |
| 104 | LN |
| 714 | LOAD |
| 204 | LOAD_FILE |
| 715 | LOCAL |
| 154 | LOCALTIME |
| 155 | LOCALTIMESTAMP |
| 205 | LOCATE |
| 610 | LOCK |
| 105 | LOG |
| 107 | LOG10 |
| 106 | LOG2 |
| 577 | LOGFILE |
| 770 | LOGS |
| 47 | LONG |
| 48 | LONGBINARY |
| 851 | LOOP |
| 206 | LOWER |
| 691 | LOW_PRIORITY |
| 207 | LPAD |
| 208 | LTRIM |
| 156 | MAKEDATE |
| 157 | MAKETIME |
| 209 | MAKE_SET |
| 570 | MASTER |
| 776 | MASTER_AUTO_POSITION |
| 777 | MASTER_BIND |
| 778 | MASTER_COMPRESSION_ALGORITHMS |
| 779 | MASTER_CONNECT_RETRY |
| 780 | MASTER_HEARTBEAT_PERIOD |
| 781 | MASTER_HOST |
| 782 | MASTER_LOG_FILE |
| 783 | MASTER_LOG_POS |
| 784 | MASTER_PASSWORD |
| 785 | MASTER_PORT |
| 538 | MASTER_POS_WAIT |
| 786 | MASTER_RETRY_COUNT |
| 787 | MASTER_SSL |
| 788 | MASTER_SSL_CA |
| 789 | MASTER_SSL_CERT |
| 790 | MASTER_SSL_CIPHER |
| 791 | MASTER_SSL_CRL |
| 792 | MASTER_SSL_CRLPATH |
| 793 | MASTER_SSL_KEY |
| 794 | MASTER_SSL_VERIFY_SERVER_CERT |
| 795 | MASTER_TLS_CIPHERSUITES |
| 796 | MASTER_TLS_VERSION |
| 797 | MASTER_USER |
| 798 | MASTER_ZSTD_COMPRESSION_LEVEL |
| 249 | MATCH |
| 472 | MAX |
| 891 | MAX_CONNECTIONS_PER_HOUR |
| 892 | MAX_QUERIES_PER_HOUR |
| 611 | MAX_ROWS |
| 684 | MAX_SIZE |
| 893 | MAX_UPDATES_PER_HOUR |
| 894 | MAX_USER_CONNECTIONS |
| 395 | MBRCONTAINS |
| 396 | MBRCOVEREDBY |
| 397 | MBRCOVERS |
| 398 | MBRDISJOINT |
| 399 | MBREQUALS |
| 400 | MBRINTERSECTS |
| 401 | MBROVERLAPS |
| 402 | MBRTOUCHES |
| 403 | MBRWITHIN |
| 273 | MD5 |
| 932 | MEDIUM |
| 432 | MEMBER |
| 727 | MEMORY |
| 670 | MERGE |
| 869 | MESSAGE_TEXT |
| 158 | MICROSECOND |
| 210 | MID |
| 24 | MIDDLEINT |
| 473 | MIN |
| 138 | MINUTE |
| 139 | MINUTE_SECOND |
| 612 | MIN_ROWS |
| 89 | MOD |
| 250 | MODE |
| 613 | MODIFY |
| 140 | MONTH |
| 159 | MONTHNAME |
| 671 | MRG_MYISAM |
| 339 | MULTILINESTRING |
| 340 | MULTIPOINT |
| 341 | MULTIPOLYGON |
| 954 | MUTEX |
| 672 | MYISAM |
| 870 | MYSQL_ERRNO |
| 655 | NAME |
| 947 | NAMES |
| 539 | NAME_CONST |
| 40 | NATIONAL |
| 741 | NATURAL |
| 41 | NCHAR |
| 673 | NDB |
| 674 | NDBCLUSTER |
| 799 | NETWORK_NAMESPACE |
| 895 | NEVER |
| 698 | NEXT |
| 571 | NO |
| 685 | NODEGROUP |
| 896 | NONE |
| 64 | NOT |
| 160 | NOW |
| 930 | NO_WRITE_TO_BINLOG |
| 488 | NTH_VALUE |
| 489 | NTILE |
| 70 | NULL |
| 83 | NULLIF |
| 871 | NUMBER |
| 30 | NUMERIC |
| 44 | NVARCHAR |
| 211 | OCT |
| 212 | OCTET_LENGTH |
| 433 | OF |
| 728 | OFFSET |
| 897 | OLD |
| 558 | ON |
| 548 | ONLY |
| 699 | OPEN |
| 614 | OPTIMIZE |
| 974 | OPTIMIZER_COSTS |
| 917 | OPTION |
| 898 | OPTIONAL |
| 716 | OPTIONALLY |
| 579 | OPTIONS |
| 73 | OR |
| 213 | ORD |
| 468 | ORDER |
| 656 | ORGANIZATION |
| 742 | OUTER |
| 729 | OUTFILE |
| 649 | OWNER |
| 615 | PACK_KEYS |
| 616 | PARSER |
| 675 | PARTIAL |
| 617 | PARTITION |
| 618 | PARTITIONING |
| 619 | PASSWORD |
| 899 | PASSWORD_LOCK_TIME |
| 427 | PATH) |
| 490 | PERCENT_RANK |
| 161 | PERIOD_ADD |
| 162 | PERIOD_DIFF |
| 944 | PERSIST |
| 945 | PERSIST_ONLY |
| 109 | PI |
| 941 | PLUGIN |
| 965 | PLUGINS |
| 839 | PLUGIN_DIR |
| 342 | POINT |
| 343 | POLYGON |
| 650 | PORT |
| 214 | POSITION |
| 110 | POW |
| 111 | POWER |
| 34 | PRECISION |
| 766 | PREPARE |
| 559 | PRESERVE |
| 700 | PREV |
| 620 | PRIMARY |
| 918 | PRIVILEGES |
| 800 | PRIVILEGE_CHECKS_USER |
| 578 | PROCEDURE |
| 919 | PROCESS |
| 955 | PROCESSLIST |
| 966 | PROFILE |
| 967 | PROFILES |
| 923 | PROXY |
| 495 | PS_CURRENT_THREAD_ID |
| 496 | PS_THREAD_ID |
| 771 | PURGE |
| 163 | QUARTER |
| 251 | QUERY |
| 692 | QUICK |
| 215 | QUOTE |
| 112 | RADIANS |
| 113 | RAND |
| 900 | RANDOM |
| 274 | RANDOM_BYTES |
| 491 | RANK |
| 549 | READ |
| 35 | REAL |
| 621 | REBUILD |
| 767 | RECOVER |
| 572 | REDO_LOG |
| 676 | REDUNDANT |
| 657 | REFERENCE |
| 677 | REFERENCES |
| 241 | REGEXP |
| 243 | REGEXP_INSTR |
| 244 | REGEXP_LIKE |
| 245 | REGEXP_REPLACE |
| 246 | REGEXP_SUBSTR |
| 901 | REGISTRATION |
| 975 | RELAY |
| 968 | RELAYLOG |
| 801 | RELAY_LOG_FILE |
| 802 | RELAY_LOG_POS |
| 748 | RELEASE |
| 286 | RELEASE_ALL_LOCKS |
| 287 | RELEASE_LOCK |
| 573 | RELOAD |
| 622 | REMOVE |
| 560 | RENAME |
| 623 | REORGANIZE |
| 624 | REPAIR |
| 216 | REPEAT |
| 762 | REPEATABLE |
| 217 | REPLACE |
| 836 | REPLICA |
| 969 | REPLICAS |
| 804 | REPLICATE_DO_DB |
| 805 | REPLICATE_DO_TABLE |
| 806 | REPLICATE_IGNORE_DB |
| 807 | REPLICATE_IGNORE_TABLE |
| 808 | REPLICATE_REWRITE_DB |
| 809 | REPLICATE_WILD_DO_TABLE |
| 810 | REPLICATE_WILD_IGNORE_TABLE |
| 811 | REPLICATION |
| 902 | REQUIRE |
| 772 | RESET |
| 876 | RESIGNAL |
| 927 | RESOURCE |
| 980 | RESTART |
| 680 | RESTRICT |
| 903 | RETAIN |
| 853 | RETURN |
| 872 | RETURNED_SQLSTATE |
| 936 | RETURNS |
| 904 | REUSE |
| 218 | REVERSE |
| 924 | REVOKE |
| 219 | RIGHT |
| 242 | RLIKE |
| 905 | ROLE |
| 299 | ROLES_GRAPHML |
| 574 | ROLLBACK |
| 114 | ROUND |
| 706 | ROW |
| 720 | ROWS |
| 300 | ROW_COUNT |
| 625 | ROW_FORMAT |
| 492 | ROW_NUMBER |
| 220 | RPAD |
| 221 | RTRIM |
| 754 | SAVEPOINT |
| 561 | SCHEDULE |
| 301 | SCHEMA |
| 956 | SCHEMAS |
| 873 | SCHEMA_NAME |
| 141 | SECOND |
| 164 | SEC_TO_TIME |
| 707 | SELECT |
| 469 | SEPARATOR |
| 3 | SERIAL |
| 763 | SERIALIZABLE |
| 580 | SERVER |
| 764 | SESSION |
| 302 | SESSION_USER |
| 550 | SET |
| 275 | SHA |
| 276 | SHA1 |
| 277 | SHA2 |
| 730 | SHARE |
| 957 | SHOW |
| 920 | SHUTDOWN |
| 115 | SIGN |
| 878 | SIGNAL |
| 258 | SIGNED |
| 116 | SIN |
| 562 | SLAVE |
| 540 | SLEEP |
| 976 | SLOW |
| 749 | SNAPSHOT |
| 651 | SOCKET |
| 937 | SONAME |
| 222 | SOUNDEX |
| 224 | SOUNDS |
| 812 | SOURCE |
| 813 | SOURCE_AUTO_POSITION |
| 814 | SOURCE_BIND |
| 815 | SOURCE_COMPRESSION_ALGORITHMS |
| 816 | SOURCE_CONNECT_RETRY |
| 817 | SOURCE_HEARTBEAT_PERIOD |
| 818 | SOURCE_HOST |
| 819 | SOURCE_LOG_FILE |
| 820 | SOURCE_LOG_POS |
| 821 | SOURCE_PASSWORD |
| 822 | SOURCE_PORT |
| 541 | SOURCE_POS_WAIT |
| 823 | SOURCE_RETRY_COUNT |
| 824 | SOURCE_SSL |
| 825 | SOURCE_SSL_CA |
| 826 | SOURCE_SSL_CERT |
| 827 | SOURCE_SSL_CIPHER |
| 828 | SOURCE_SSL_CRL |
| 829 | SOURCE_SSL_CRLPATH |
| 830 | SOURCE_SSL_KEY |
| 831 | SOURCE_SSL_VERIFY_SERVER_CERT |
| 832 | SOURCE_TLS_CIPHERSUITES |
| 833 | SOURCE_TLS_VERSION |
| 834 | SOURCE_USER |
| 835 | SOURCE_ZSTD_COMPRESSION_LEVEL |
| 225 | SPACE |
| 626 | SPATIAL |
| 877 | SQLSTATE |
| 840 | SQL_AFTER_GTIDS |
| 841 | SQL_AFTER_MTS_GAPS |
| 842 | SQL_BEFORE_GTIDS |
| 731 | SQL_BIG_RESULT |
| 732 | SQL_BUFFER_RESULT |
| 733 | SQL_CALC_FOUND_ROWS |
| 773 | SQL_LOG_BIN |
| 734 | SQL_NO_CACHE |
| 735 | SQL_SMALL_RESULT |
| 843 | SQL_THREAD |
| 117 | SQRT |
| 906 | SSL |
| 750 | START |
| 717 | STARTING |
| 646 | STARTS |
| 278 | STATEMENT_DIGEST |
| 279 | STATEMENT_DIGEST_TEXT |
| 627 | STATS_AUTO_RECALC |
| 628 | STATS_PERSISTENT |
| 629 | STATS_SAMPLE_PAGES |
| 958 | STATUS |
| 474 | STD |
| 475 | STDDEV |
| 476 | STDDEV_POP |
| 477 | STDDEV_SAMP |
| 844 | STOP |
| 963 | STORAGE |
| 678 | STORED |
| 736 | STRAIGHT_JOIN |
| 240 | STRCMP |
| 938 | STRING |
| 165 | STR_TO_DATE |
| 365 | ST_AREA |
| 344 | ST_ASBINARY |
| 408 | ST_ASGEOJSON |
| 346 | ST_ASTEXT |
| 345 | ST_ASWKB |
| 347 | ST_ASWKT |
| 373 | ST_BUFFER |
| 374 | ST_BUFFER_STRATEGY |
| 366 | ST_CENTROID |
| 410 | ST_COLLECT |
| 384 | ST_CONTAINS |
| 375 | ST_CONVEXHULL |
| 385 | ST_CROSSES |
| 376 | ST_DIFFERENCE |
| 349 | ST_DIMENSION |
| 386 | ST_DISJOINT |
| 387 | ST_DISTANCE |
| 411 | ST_DISTANCE_SPHERE |
| 359 | ST_ENDPOINT |
| 350 | ST_ENVELOPE |
| 388 | ST_EQUALS |
| 367 | ST_EXTERIORRING |
| 389 | ST_FRECHETDISTANCE |
| 404 | ST_GEOHASH |
| 306 | ST_GEOMCOLLFROMTEXT |
| 321 | ST_GEOMCOLLFROMWKB |
| 307 | ST_GEOMETRYCOLLECTIONFROMTEXT |
| 322 | ST_GEOMETRYCOLLECTIONFROMWKB |
| 308 | ST_GEOMETRYFROMTEXT |
| 323 | ST_GEOMETRYFROMWKB |
| 371 | ST_GEOMETRYN |
| 351 | ST_GEOMETRYTYPE |
| 409 | ST_GEOMFROMGEOJSON |
| 309 | ST_GEOMFROMTEXT |
| 324 | ST_GEOMFROMWKB |
| 390 | ST_HAUSDORFFDISTANCE |
| 368 | ST_INTERIORRINGN |
| 377 | ST_INTERSECTION |
| 391 | ST_INTERSECTS |
| 360 | ST_ISCLOSED |
| 352 | ST_ISEMPTY |
| 353 | ST_ISSIMPLE |
| 412 | ST_ISVALID |
| 405 | ST_LATFROMGEOHASH |
| 355 | ST_LATITUDE |
| 361 | ST_LENGTH |
| 310 | ST_LINEFROMTEXT |
| 325 | ST_LINEFROMWKB |
| 378 | ST_LINEINTERPOLATEPOINT |
| 379 | ST_LINEINTERPOLATEPOINTS |
| 311 | ST_LINESTRINGFROMTEXT |
| 326 | ST_LINESTRINGFROMWKB |
| 406 | ST_LONGFROMGEOHASH |
| 356 | ST_LONGITUDE |
| 413 | ST_MAKEENVELOPE |
| 312 | ST_MLINEFROMTEXT |
| 327 | ST_MLINEFROMWKB |
| 314 | ST_MPOINTFROMTEXT |
| 329 | ST_MPOINTFROMWKB |
| 316 | ST_MPOLYFROMTEXT |
| 331 | ST_MPOLYFROMWKB |
| 313 | ST_MULTILINESTRINGFROMTEXT |
| 328 | ST_MULTILINESTRINGFROMWKB |
| 315 | ST_MULTIPOINTFROMTEXT |
| 330 | ST_MULTIPOINTFROMWKB |
| 317 | ST_MULTIPOLYGONFROMTEXT |
| 332 | ST_MULTIPOLYGONFROMWKB |
| 372 | ST_NUMGEOMETRIES |
| 369 | ST_NUMINTERIORRING |
| 370 | ST_NUMINTERIORRINGS |
| 362 | ST_NUMPOINTS |
| 392 | ST_OVERLAPS |
| 380 | ST_POINTATDISTANCE |
| 407 | ST_POINTFROMGEOHASH |
| 318 | ST_POINTFROMTEXT |
| 333 | ST_POINTFROMWKB |
| 363 | ST_POINTN |
| 319 | ST_POLYFROMTEXT |
| 334 | ST_POLYFROMWKB |
| 320 | ST_POLYGONFROMTEXT |
| 335 | ST_POLYGONFROMWKB |
| 414 | ST_SIMPLIFY |
| 354 | ST_SRID |
| 364 | ST_STARTPOINT |
| 348 | ST_SWAPXY |
| 381 | ST_SYMDIFFERENCE |
| 393 | ST_TOUCHES |
| 382 | ST_TRANSFORM |
| 383 | ST_UNION |
| 415 | ST_VALIDATE |
| 394 | ST_WITHIN |
| 357 | ST_X |
| 358 | ST_Y |
| 874 | SUBCLASS_ORIGIN |
| 166 | SUBDATE |
| 907 | SUBJECT |
| 226 | SUBSTR |
| 227 | SUBSTRING |
| 228 | SUBSTRING_INDEX |
| 167 | SUBTIME |
| 478 | SUM |
| 921 | SUPER |
| 168 | SYSDATE |
| 658 | SYSTEM |
| 303 | SYSTEM_USER |
| 54 | TABLE |
| 757 | TABLES |
| 630 | TABLESPACE |
| 875 | TABLE_NAME |
| 118 | TAN |
| 688 | TEMPORARY |
| 718 | TERMINATED |
| 79 | THEN |
| 928 | THREAD_PRIORITY |
| 38 | TIME |
| 170 | TIMEDIFF |
| 37 | TIMESTAMP |
| 171 | TIMESTAMPADD |
| 172 | TIMESTAMPDIFF |
| 259 | TIMEZONE |
| 173 | TIME_FORMAT |
| 174 | TIME_TO_SEC |
| 575 | TLS |
| 638 | TO |
| 229 | TO_BASE64 |
| 175 | TO_DAYS |
| 176 | TO_SECONDS |
| 983 | TRADITIONAL |
| 233 | TRAILING |
| 751 | TRANSACTION |
| 984 | TREE |
| 687 | TRIGGER |
| 959 | TRIGGERS |
| 234 | TRIM |
| 16 | TRUE |
| 119 | TRUNCATE |
| 631 | TYPE |
| 235 | UCASE |
| 908 | UNBOUNDED |
| 765 | UNCOMMITTED |
| 280 | UNCOMPRESS |
| 281 | UNCOMPRESSED_LENGTH |
| 639 | UNDO |
| 236 | UNHEX |
| 942 | UNINSTALL |
| 632 | UNION |
| 633 | UNIQUE |
| 177 | UNIX_TIMESTAMP |
| 925 | UNKNOWN |
| 756 | UNLOCK |
| 909 | UNREGISTER |
| 20 | UNSIGNED |
| 852 | UNTIL |
| 681 | UPDATE |
| 262 | UPDATEXML |
| 634 | UPGRADE |
| 237 | UPPER |
| 922 | USAGE |
| 686 | USE |
| 304 | USER |
| 977 | USER_RESOURCES |
| 934 | USE_FRM |
| 693 | USING |
| 178 | UTC_DATE |
| 179 | UTC_TIME |
| 180 | UTC_TIMESTAMP |
| 542 | UUID |
| 543 | UUID_SHORT |
| 544 | UUID_TO_BIN |
| 282 | VALIDATE_PASSWORD_STRENGTH |
| 4 | VALUE |
| 545 | VALUES |
| 45 | VARCHARACTER |
| 946 | VARIABLE |
| 960 | VARIABLES |
| 481 | VARIANCE |
| 46 | VARYING |
| 479 | VAR_POP |
| 480 | VAR_SAMP |
| 929 | VCPU |
| 305 | VERSION |
| 641 | VIEW |
| 679 | VIRTUAL |
| 635 | VISIBLE |
| 640 | WAIT |
| 456 | WAIT_FOR_EXECUTED_GTID_SET |
| 457 | WAIT_UNTIL_SQL_THREAD_AFTER_GTIDS |
| 961 | WARNINGS |
| 181 | WEEK |
| 182 | WEEKDAY |
| 183 | WEEKOFYEAR |
| 238 | WEIGHT_STRING |
| 80 | WHEN |
| 694 | WHERE |
| 854 | WHILE |
| 252 | WITH |
| 752 | WORK |
| 652 | WRAPPER |
| 753 | WRITE |
| 910 | X509 |
| 768 | XA |
| 74 | XOR |
| 142 | YEAR |
| 184 | YEARWEEK |
| 143 | YEAR_MONTH |
| 21 | ZEROFILL |
| 265 | ^ |
| 263 | | |
| 268 | ~ |
+-----------------+----------------------------------------+
985 rows in set (0.01 sec) mysql> select * from help_keyword where name='abs';
+-----------------+------+
| help_keyword_id | name |
+-----------------+------+
| 90 | ABS |
+-----------------+------+
1 row in set (0.00 sec) 🔥 單條件查詢 🔥
where子句（單條件查詢）
在SQL中，insert、update、delete和select後面都能帶where子句，用于插入、修改、删除或查詢指定條件的記錄。
SQL中使用where子句文法
SELECT column_name FROM table_name WHERE column_name 運算符 value運算符描述=等于<> 或 !=不等于>大于<小于>=大于等于<=小于等于between and選擇取決于兩個資料之間的範圍；在MySQL相當于>=并且<=；
🔥 多條件查詢 🔥
where子句（多條件查詢）
and、or運算符文法
SELECT column_name FROM table_name WHERE condtion1 AND condition_2 OR condition_3
在where子句中，使用android、or可以把兩個或多個過濾條件結合起來
運算符描述and表示左右兩邊的條件同時成立or表示左右兩邊一個條件成立
建立表 （create table employee）
mysql> create table employee(id int not null auto_increment primary key,
name varchar(30) comment '姓名',sex varchar(1) comment '性别',
salary int comment '薪資（元）');
Query OK, 0 rows affected (0.02 sec)
插入資料
insert into employee(name,sex,salary) values ('張三','男',5500);
insert into employee(name,sex,salary) values('李四','男',4500);
insert into employee(name,sex,salary) values('張小妹','女',4500);
查詢資料
select * from employee;
+----+--------+------+--------+
| id | name | sex | salary |
+----+--------+------+--------+
| 1 | 張三 | 男 | 5500 |
| 2 | 李四 | 男 | 4500 |
| 3 | 張小妹 | 女 | 4500 |
+----+--------+------+--------+
按條件查詢資料
![【MySQL資料庫】資料庫索引事務1.索引2.事務[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)