How to delete data that not exists in another table? How to delete duplicate rows from temp table? How to delete last 6 months data using storedprocedure where table does'nt contains timestamp field How to delete or drop a cursor? How to delete Row from table which has FK Constraint on...
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Jira Link: DB-3946 Description In tpcc, we have a method enableForeignKeys, which creates FKs after data is loaded. In this method, drop constraint with 'if exists' is giving ERROR, causing this statement to fail, and as a result other a...
PostgreSQL migrations forDROP CONSTRAINTshould includeIF EXISTS This sounds minor, but would make migrations a lot less fragile when reverting / dealing with merge conflicts. Hopefully this is a simple change too 🙂 Current ALTER TABLE "social_groupmember" DROP CONSTRAINT "social_groupmember_group_...
[ApplicationUsage] DROP CONSTRAINT [CK_ApplicationUsage_shutdown_state] IF EXISTS (select * from dbo.sysobjects where id = object_id(N'[dbo].[CK_ApplicationUsage_start_time_LEQ_end_time_MULTIFIELD]')) ALTER TABLE [dbo].[ApplicationUsage] DROP CONSTRAINT [CK_ApplicationUsage_start_time_LEQ_...
Alert table 表名 drop constraint 约束名 9.使用SQL语句创建登录 (1)创建登录账户:(SQL账户和Windows账户) EXEC sp_grandlogin ‘windows 域名\域账户 ---windows账户 EXEC sp_addlogin ‘账户名’,’密码’ ---SQL账户 (2)创建数据库用户:EXEC sp_grantdbaccess ‘登录账户’,’数据库用户’ (3)...
If it is there, I want to drop it first then add it. But how can I know its existance? Is there any If and Else clause to judge it? Code Snippet if ...exists drop ... Else alter table xxxx add constraint aaa unique(SomeColumn) Thanks...
if (exists (select * from information_schema.columns where table_name = 'student' and column_name = 'tel')) alter table student drop column tel go ▓▓ 添加、删除约束 --添加新列、约束 alter table student add number varchar(20) null constraint no_uk unique; ...
I don't like these, and if you also don't like them, then you might try new DROP IF EXISTS (a.k.a. DIE :) ) statements in SQL Server 2016.From SQL Server 2016 CTP3 you can use new DIE statements instead of big IF wrappers, e.g.:...
drop: 删除 procedure :存储过程 if exists :判断是否存在 scema_changhe 存储过程名称; 判断这个名称的存储过程是否存在,存在就删除,然后再创建了这个存储过程,执行完之后又将它删除了(个人觉得你这段是有问题的delimiter ';;';)