Check if table exists in SQL Server

前端 未结 28 1505
梦如初夏
梦如初夏 2020-11-22 04:23

I would like this to be the ultimate discussion on how to check if a table exists in SQL Server 2000/2005 using SQL Statements.

When you Google for the answer, you g

相关标签:
28条回答
  • 2020-11-22 04:54

    There is one more option to check if the table exists across databases

    IF EXISTS(SELECT 1 FROM [change-to-your-database].SYS.TABLES WHERE NAME = 'change-to-your-table-name')
    BEGIN
        -- do whatever you want
    END
    
    0 讨论(0)
  • 2020-11-22 04:58

    We always use the OBJECT_ID style for as long as I remember

    IF OBJECT_ID('*objectName*', 'U') IS NOT NULL 
    
    0 讨论(0)
  • 2020-11-22 04:58

    Looking for a table on a different database:

    if exists (select * from MyOtherDatabase.sys.tables where name = 'MyTable')
        print 'Exists'
    
    0 讨论(0)
  • 2020-11-22 04:58

    In SQL Server 2000 you can try:

    IF EXISTS(SELECT 1 FROM sysobjects WHERE type = 'U' and name = 'MYTABLENAME')
    BEGIN
       SELECT 1 AS 'res' 
    END
    
    0 讨论(0)
  • 2020-11-22 04:59

    For queries like this it is always best to use an INFORMATION_SCHEMA view. These views are (mostly) standard across many different databases and rarely change from version to version.

    To check if a table exists use:

    IF (EXISTS (SELECT * 
                     FROM INFORMATION_SCHEMA.TABLES 
                     WHERE TABLE_SCHEMA = 'TheSchema' 
                     AND  TABLE_NAME = 'TheTable'))
    BEGIN
        --Do Stuff
    END
    
    0 讨论(0)
  • 2020-11-22 05:05

    Please see the below approaches,

    Approach 1: Using INFORMATION_SCHEMA.TABLES view

    We can write a query like below to check if a Customers Table exists in the current database.

    IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = N'Customers')
    BEGIN
        PRINT 'Table Exists'
    END
    

    Approach 2: Using OBJECT_ID() function

    We can use OBJECT_ID() function like below to check if a Customers Table exists in the current database.

    IF OBJECT_ID(N'dbo.Customers', N'U') IS NOT NULL
    BEGIN
        PRINT 'Table Exists'
    END
    

    Approach 3: Using sys.Objects Catalog View

    We can use the Sys.Objects catalog view to check the existence of the Table as shown below:

    IF EXISTS(SELECT 1 FROM sys.Objects WHERE  Object_id = OBJECT_ID(N'dbo.Customers') AND Type = N'U')
    BEGIN
       PRINT 'Table Exists'
    END
    

    Approach 4: Using sys.Tables Catalog View

    We can use the Sys.Tables catalog view to check the existence of the Table as shown below:

     IF EXISTS(SELECT 1 FROM sys.Tables WHERE  Name = N'Customers' AND Type = N'U')
     BEGIN
          PRINT 'Table Exists'
     END
    

    Approach 5: Avoid Using sys.sysobjects System table

    We should avoid using sys.sysobjects System Table directly, direct access to it will be deprecated in some future versions of the Sql Server. As per Microsoft BOL link, Microsoft is suggesting to use the catalog views sys.objects/sys.tables instead of sys.sysobjects system table directly.

      IF EXISTS(SELECT name FROM sys.sysobjects WHERE Name = N'Customers' AND xtype = N'U')
      BEGIN
         PRINT 'Table Exists'
      END
    

    referred from: http://sqlhints.com/2014/04/13/how-to-check-if-a-table-exists-in-sql-server/

    0 讨论(0)
提交回复
热议问题