1.语法:ALTER TABLE 表名 ADD CONSTRAINT 主键名 PRIMARY KEY 表名(主键字段); 3.添加外键 1.语法:ALTER TABLE 表名 ADD CONNSTRAINT 外键名 FOREIGN KEY(外键字段) REFERENCES 关联表名(关联字段); 4.插入单(多)条数据记录(和SQL Server相同,但是不能用select多列添加数据) 1.INSERT INTO 表名[(字段名...
二. Alter table 用法 针对表结构进行修改,比如添加列删除列等等... 1.添加列 语法 Altertable表名ADD列名数据类型 例: (给Teacher表中添加一列notes 数据类型为varchar(200)) alter table Teacher add notes varchar(200) 2.删除表中的列 语法 Altertable表名dropcolumn列名 例:(删除表中的notes列) alter t...
[ WITH ( <low_priority_lock_wait> ) ] } [ ; ] -- ALTER TABLE options < table_constraint > ::= [ CONSTRAINT constraint_name ] { {PRIMARY KEY | UNIQUE } { NONCLUSTERED (column [ ASC | DESC ] [ ,... n ]) | NONCLUSTERED HASH (column [ ,... n ] ) WITH ( BUCKET_COUNT ...
IMPLICITLY HIDDEN は、ROW CHANGE TIMESTAMP 列にのみ指定する必要があります (SQLSTATE 42867)。ROW CHANGE TIMESTAMP FOR table-designator 式はIMPLICITLY HIDDEN ROW CHANGE TIMESTAMP 列に解決します。 したがって、ROW CHANGE TIMESTAMP 列は IMPLICITLY HIDDEN として表に追加することができ、この表か...
ALTER TABLEGROUP tablegroup_name alter_tablegroup_partition_option; alter_tablegroup_partition_option: DROP PARTITION '(' name_list ')' | ADD PARTITION opt_range_partition_list 修改表组的 Locality 和 Primary Zone。 ALTER TABLEGROUP tablegroup_name alter_tablegroup_actions [, alter_tablegroup_...
ALTERTABLE`user` RENAMECOLUMNcreate_timeTOorder_id>1064-You have an errorinyour SQL syntax;checkthe manual that correspondstoyour MySQL server versionfortherightsyntaxtousenear'COLUMN create_time TO order_id'at line11>时间: 0s 但是在MySQL8.X是可以的(我在Docker上创建一个8.X的容器) ...
PRIMARY KEY index_parameters | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE referential_action ] [ ON UPDATE referential_action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] 而table_constraint是: [ ...
设置alter table 语句中的等待时间,如果在指定时间没有拿到 MDL 写锁,直接退出,不至于长时间阻塞后面的业务操作。失败,就后面多尝试几次。 意向锁 InnoDB 存储引擎支持多粒度锁,这种锁定允许事务在行级别上的锁和表级别上的锁同时存在。这种锁就是意向锁。
If you are not the owner of the table, you need the DROP ANY TABLE privilege in order to use the drop_table_partition or truncate_table_partition clause. You must also have space quota in the tablespace in which space is to be acquired in order to use the add_table_partition, modify_...
This is sometimes also referred to as a “non-copying” or “online” ALTER TABLE. INSTANT: Not supported by NDB. See Section 25.6.12, “Online Operations with ALTER TABLE in NDB Cluster”, for more information. The ALGORITHM clause is optional. If the ALGORITHM clause is omitted, MySQL...