如何检查SQL Server中是否存在列？

Question

如何检查SQL Server 2000中是否存在列？

Answer 1

IF EXISTS ( SELECT * FROM INFORMATION_SCHEMA.COLUMNS
WHERE  TABLE_NAME='tablename' AND COLUMN_NAME='columname' )

Answer 2

If col_length('table_name','column_name') is null
    select 0 as Present
ELSE
    select 1 as Present

Present将为0,table_name中是否存在column_name,否则为1

@CMS:我不认为'INFORMATION_SCHEMA.COLUMNS'有关于DB中每个表的信息.因为这对我没用.但我的回答确实有效.

Answer 3

在查询分析器中，选择包含该表的数据库，您需要在其中检查该字段是否存在，然后运行以下查询。

SELECT count(*) AS [Column Exists] 
FROM SYSOBJECTS  
INNER JOIN SYSCOLUMNS ON SYSOBJECTS.ID = SYSCOLUMNS.ID 
WHERE 
 SYSOBJECTS.NAME = 'myTable' 
 AND SYSCOLUMNS.NAME = 'Myfield'