13.7.5.23 SHOW INDEX Syntax 13.7.5.24 SHOW MASTER STATUS Syntax 13.7.5.25 SHOW OPEN TABLES Syntax 13.7.5.26 SHOW PLUGINS Syntax 13.7.5.27 SHOW PRIVILEGES Syntax 13.7.5.28 SHOW PROCEDURE CODE Syntax 13.7.5.29 SHO
CountryCode Seq_in_index: 1 Column_name: CountryCode Collation: A Cardinality: 232 Sub_part: NULL Packed: NULL Null: Index_type: BTREE Comment: Index_comment: Visible: YES Expression: NULL An alternative to tbl_name FROM db_name syntax is db_name.tbl_name...
CountryCode Seq_in_index: 1 Column_name: CountryCode Collation: A Cardinality: 232 Sub_part: NULL Packed: NULL Null: Index_type: BTREE Comment: Index_comment: An alternative to tbl_name FROM db_name syntax is db_name.tbl_name
| Name | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collation | Checksum | Create_options | Comment | +---+---+---+---+---+---+---+---...
1. 使用SHOW INDEX语句 SHOW INDEX语句可以用于查看表中的索引信息。该语句的语法如下: SHOWINDEXFROMtable_name[FROMdatabase_name] 1. 其中,table_name是要查看索引的表名,database_name是可选的,表示要查看的数据库名。如果不指定database_name,则默认为当前使用的数据库。
SHOW TRIGGERS [FROM db_name] [like_or_where] SHOW [GLOBAL | SESSION] VARIABLES [like_or_where] SHOW WARNINGS [LIMIT [offset,] row_count] like_or_where: LIKE 'pattern' | WHERE expr If the syntax for a givenSHOWstatement includes aLIKE 'pattern'part,'pattern'is a string that can cont...
mysql> alter table users character set GBK; Query OK, 3 rows affected (0.08 sec) Records: 3 Duplicates: 0 Warnings: 0 查看表的结构: mysql> show create users; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for ...
(3)全文索引字段值要进行切词处理,按syntax字符进行切割,例如b+aaa,切分成b和aaa (4)全文索引匹配查询,默认使用的是等值匹配,例如a匹配a,不会匹配ab,ac。如果想匹配可以在布尔模式下搜索a* select*fromuserwherematch(name) against('a*'inboolean mode); ...
全文索引字段值要进行切词处理,按syntax字符进行切割,例如b+aaa ,切分成b和aaa 全文索引匹配查询,默认使用的是等值匹配,例如a匹配a ,不会匹配ab,ac。如果想匹配可以在布尔模式下搜索a* select * from userwhere match(name) against('a*' in boolean mode); ...
语法分析:如果语法有误,则提示“You have an error in your SQL syntax”; 第四步:优化器 决定用哪个索引;联查表连接顺序;条件执行优先级 ,等等; 第五步:执行器 (执行SQL) 第六步:存储引擎(提供读写接口,供执行器调用并获取结果集) 首先会判断你是否有该权限; ...