SQL 导出数据字典
用于参考：
SELECT
表名=case when a.colorder=1 then d.name else ‘‘ end,
表说明=case when a.colorder=1 then isnull(f.value,‘‘) else ‘‘ end,
字段序号=a.colorder,
字段名=a.name,
主键=case when exists(SELECT 1 FROM sysobjects where xtype=‘PK‘ and name in (
SELECT name FROM sysindexes WHERE indid in(
SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid
))) then ‘√‘ else ‘‘ end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,‘PRECISION‘),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,‘Scale‘),0),
允许空=case when a.isnullable=1 then ‘√‘else ‘‘ end,
字段说明=isnull(g.[value],‘‘)
FROM syscolumns a
left join systypes b on a.xtype=b.xusertype
inner join sysobjects d on a.id=d.id and d.xtype=‘U‘ and d.name<>‘dtproperties‘
left join syscomments e on a.cdefault=e.id
left join sys.extended_properties g on a.id=g.major_id and a.colid=g.minor_id
left join sys.extended_properties f on d.id=f.major_id and f.minor_id =0
where d.name=‘表名‘ --如果只查询指定表,加上此条件
order by a.id
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