sql - 如何从表中获取列类型？

Question

我有这个代码:

select  a.id as tableid,
    a.name as tableName, 
    b.name as columnName,
    b.status as columnStatus,
    b.type as columnType
    from sysobjects a 
    LEFT JOIN syscolumns b
    ON a.id = b.id
    WHERE a.name = 'table_name'

现在， columType 显示数字。我想获取 columnType 的名称，该名称位于表“systypes”的“name”列中。我怎么做？简单的 LEFT JOIN 将导致重复的行。

Answer 1

我在 Sybase 15.0 中看到过，这是您必须使用的代码:

select o.id [tableid], o.name [tableName], c.name [columnName], c.status [columnStatus], t.name [columnType] from sysobjects o
inner join syscolumns c on c.id = o.id
inner join systypes t on t.usertype = c.usertype
where o.type = 'U' and o.name in ('tablename')