drop function if exists sql server

Original: SQL Server 2016 new feature: DROP IF EXISTS??When we write T-SQL to delete an object (table, stored procedure, etc.), it is customary to use the IF statement to determine whether the object exists and then drop it, for example:Old

1 determining whether a database existsSQL codeif exists (SELECT * from sys.databases WHERE name = ' database name ')drop database [DB name] if exists (SELECT * from sys.databases WHERE name = ' database name ')drop database [DB name]2 Determining

C # Connecting to SQL Server databases For the different. NET data provider, ADO. NET uses different connection objects to connect to the database. These connection objects mask the specific implementation details, and provide a unified

--查看对象是否已经存在  --数据库是否存在   --if exists (select * from sys.databases where name = ’数据库名’)    --  drop database [数据库名]      if exists(select * from sys.databases where name=‘FGM_POS‘)  print ‘存在‘--drop database [数据库名]   --表是否存在   --if exists (select *

Use if exists to build a table "go"1 Determine if the database has SQL codeif exists (SELECT * from sys.databases WHERE name = ' database name ')drop database [DB name] if exists (SELECT * from sys.databases WHERE name = ' database name ')drop

SQL Server determines whether an object exists1 Determine if the database has SQL codeif exists (SELECT * from sys.databases WHERE name = ' database name ') drop database [DB name]2 Determine if the table has SQL codeif exists (select * from

How to determine the existence of a table or database in SQL server, but in actual use, you need to determine the Status bit:Some status bits can be set by the user using sp_dboption (read only, dbo use only, single user, etc: 1 = autoclose; Use

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small,

SQL server to determine whether a table or temporary table exists, SQL server 1. Determine whether a data table exists Method 1: Use yourdb; goif object_id (N 'tablename', N 'U') is not nullprint 'There is 'else' print' doesn't exist' For

1 determining whether a database existsif exists(Select * fromsys.databaseswhereName=' database name ')Drop Database [Database name] if exists(Select * fromsys.databaseswhereName=' database name ')Drop Database [Database name]2 Determining