1 Prepare Procedure 准备程序,先要运行一下,以生成创建SQL Server Constraint/Index的脚本。 有五个关键的存储过程要先运行CreateKeyIndex.sql ,DropKeyIndex.sql,ScriptCreateTableKeys.sql,ScriptDropTableKeys.sql,G enerateDefaultCollation.sql 。目的如它的名字所示,创建索引和约束。 在编程过程,原本是想把这几...
AUTO_CLEANUP=ON,--打开自动清理选项CHANGE_RETENTION=1HOURS--数据保存期为1 时);GO--===--测试的表USEDB_test;GOCREATETABLEdbo.tb( idintCONSTRAINTPK_tb_idPRIMARYKEY, col1int, col2varchar(10), col3nvarchar(max), col4varbinary(max), col5 xml );GOALTERTABLEdbo.tb ENABLE CHANGE_TRACKINGWITH...
This option can't be used when there's a CHECK or DEFAULT constraint on a user-defined type (UDT) column, if a UDT column is part of the primary key, or if a computed column references a UDT column. 0x40 Generates corresponding nonclustered indexes. 0x80 Includes declared referential ...
The above example shows that the constraintCK_Product_Weightis dependent upon the columnweight. If the business line asks the IT team to change the column name toWeightGrams, we must perform the following steps: Step 1 – Drop existing constraint Step 2 – Rename existing column Step 3 – C...
删除外键(drop foreign key constrain_name)时,需要指定名称_constraint_name,而不是原始的constraint_name。 如:CONSTRAINT `fk_foo` FOREIGN KEY (`foo_id`) REFERENCES `bar` (`foo_id`),需要指定:--alter "DROP FOREIGN KEY _fk_foo" --alter-foreign-keys-method ...
1ALTERTABLEDEFAULTCHARACTERSETutf8COLLATEutf8_bin; Revert the MySQL constraint checks for foreign keys with the below query; 1SETforeign_key_checks=1; Updated onApril 16, 2025
[SQL]ALTER TABLE sh_incentive_item MODIFY id SMALLINT UNSIGNED AUTO_INCREMENT;[Err]1833-Cannot change column'id':used in a foreign key constraint'FK_sh_incentive_item_id'of table'storehelper.sh_incentive' 1. 2. 发现是因为外键的影响,不能随便的更改表结构。
报错信息: 1 queries executed, 0 success, 1 errors, 0 warnings 查询:alter table server_list modify column server_lip char(25) 错误代码: 1833 Cannot change column 'server_lip': used in a foreign key constraint 'server_history_ibfk_1' of table 'OMServer.server_history' ...
CONSTRAINT[PK_A]PRIMARYKEYCLUSTERED ( [MAXID]ASC )WITH(PAD_INDEX=OFF,STATISTICS_NORECOMPUTE=OFF,IGNORE_DUP_KEY=OFF,ALLOW_ROW_LOCKS=ON,ALLOW_PAGE_LOCKS=ON)ON[PRIMARY] )ON[PRIMARY] --在数据库和表启动更改跟踪: ALTERDATABASEtest SETCHANGE_TRACKING=ON ...
In order to add/alter an option using CHNAGE MASTER TO command, currently it is necessary to do a STOP SLAVE before CHANGE MASTER. This worklog relaxes this constraint. Lets look at the three scenarios below to understand more about this task. 1) BOTH IO AND SQL THREAD ARE STOPPED When ...