还有一种变化。。。

SELECT 
  Count(*) AS existFlag 
FROM 
  sys.columns 
WHERE 
  [name] = N 'ColumnName' 
  AND [object_id] = OBJECT_ID(N 'TableName')

试试这个。。。

IF NOT EXISTS(
  SELECT TOP 1 1
  FROM INFORMATION_SCHEMA.COLUMNS
  WHERE 
    [TABLE_NAME] = 'Employees'
    AND [COLUMN_NAME] = 'EmployeeID')
BEGIN
  ALTER TABLE [Employees]
    ADD [EmployeeID] INT NULL
END

IF NOT EXISTS(SELECT NULL
              FROM  INFORMATION_SCHEMA.COLUMNS
              WHERE table_name = 'TableName'
                    AND table_schema = 'SchemaName'
                    AND column_name = 'ColumnName') BEGIN

  ALTER TABLE [SchemaName].[TableName] ADD [ColumnName] int(1) NOT NULL default '0';

END;

如果列不存在，请执行以下操作：

BEGIN
    IF (COL_LENGTH('[dbo].[Table]', 'Column ') IS NULL)
    BEGIN
        // Do something
    END
END;

如果列确实存在，请执行以下操作：

BEGIN
    IF (COL_LENGTH('[dbo].[Table]', 'Column ') IS NOT NULL)
    BEGIN
        // Do something
    END
END;

declare @myColumn   as nvarchar(128)
set @myColumn = 'myColumn'
if not exists (
    select  1
    from    information_schema.columns columns 
    where   columns.table_catalog   = 'myDatabase'
        and columns.table_schema    = 'mySchema' 
        and columns.table_name      = 'myTable' 
        and columns.column_name     = @myColumn
    )
begin
    exec('alter table myDatabase.mySchema.myTable add'
    +'    ['+@myColumn+'] bigint       null')
end

select distinct object_name(sc.id)
from syscolumns sc,sysobjects so  
where sc.name like '%col_name%' and so.type='U'