--查询数据库中表名 字段 数据类型 长度

SELECT 
    a.name AS TableName,
    b.name AS ColName,
    c.name AS  ValType,
    b.length AS ValLength
FROM sysobjects a 
    INNER JOIN syscolumns b ON a.id = b.id 
        INNER JOIN systypes c ON c.xtype = b.xtype 
WHERE a.xtype = 'U' AND c.name != 'sysname'
--查询数据库中 表名 字段 数据类型 长度