描述信息 使用 "DROP TABLE IF EXISTS" 语句删除表格 section 结束 描述信息 完成操作,关闭数据库连接 步骤一:连接到 SQL Server 数据库 首先,我们需要连接到 SQL Server 数据库。打开 SQL Server Management Studio (SSMS),在“Connect to Server” 窗口中填写正确的服务器名称和身份验证选项,然后点击 “Connect”...
In MySQL it is pretty easy to drop a table if it exists already. In Oracle and Microsoft’s SQL Server it is a little more complicated. Today I want to present you the solutions for these two DBMS’. MySQL: DROP TABLE IF EXISTS [table_name] Oracle: BEGIN EXECUTE IMMEDIATE 'DROP TABLE...
DROP TABLE IF EXISTS [table_name] Oracle: BEGIN EXECUTE IMMEDIATE 'DROP TABLE [table_name]'; EXCEPTION WHEN OTHERS THEN NULL; END; SQL Server: IF EXISTS ( SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '[table_name]') DROP TABLE [table_name]...
SQLSQL MySQL: DROP TABLE IF EXISTS [table_name] Oracle: BEGIN EXECUTE IMMEDIATE 'DROP TABLE [table_name]'; EXCEPTION WHEN OTHERS THEN NULL;END; SQL Server: IF EXISTS ( SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '[table_name]')DROP TABLE [table_name]分享...
原文:SQL Server 2016新特性:DROP IF EXISTS 在我们写T-SQL要删除某个对象(表、存储过程等)时,一般会习惯先用IF语句判断该对象是否存在,然后DROP,比如: 旧版本: IF OBJECT_ID('dbo.PERSON','U') IS NOT NULL DROP TABLE PERSON IF EXISTS (SELECT * FROM sys.objects where name = 'PERSON')...
DROPobject_typeIFEXISTSobject_name 能够用于DROP的object_type，如Tables, Database, Function, Trigger, Stored Procedure, Column, User, Type, View, Schema，皆可套用,比如：ALTER TABLE PERSONDROP COLUMN If EXISTS NAME SQL Server 2016新特性：DROP IF EXISTS 标签：basesysges.netschfunctionname...
if you execute the printed results @SQL, the foreign keys will be dropped. Run the sql query: SET FOREIGN_KEY_CHECKS = 0; DROP TABLE table_name Hope it helps! --Find and drop the constraintsDECLARE@dynamicSQLVARCHAR(MAX)DECLAREMY_CURSORCURSORLOCALSTATICREAD_ONLY FORWARD_O...
In SQL Server 2016 CTP3 objects can DIE (DROP IF EXISTS) Do you like to write following conditional DROP statements: IF OBJECT_ID('dbo.Product, 'U') IS NOT NULL DROP TABLE dbo.Product; IF EXISTS (SELECT * FROM sys.triggers WHERE name = 'trProductInsert') ...
点击查看代码 DROP TABLE IF EXISTS `tbl_book`; CREATE TABLE `tbl_book` ( `id` int(11) NOT NULL AUTO_INCREMENT, `type` varchar(20) DEFAULT NULL, `name` varcha
In SQL Server 2016 CTP3 objects can DIE (DROP IF EXISTS)Do you like to write following conditional DROP statements:scroll Copy IF OBJECT_ID('dbo.Product, 'U') IS NOT NULL DROP TABLE dbo.Product; IF EXISTS (SELECT * FROM sys.triggers WHERE name = 'trProductInsert') D...