数据库字典查询

 1 SELECT  表名 = CASE WHEN a.colorder = 1 THEN d.name
 2                   ELSE ‘‘
 3              END ,
 4         表说明 = CASE WHEN a.colorder = 1 THEN ISNULL(f.value, ‘‘)
 5                    ELSE ‘‘
 6               END ,
 7         字段序号 = a.colorder ,
 8         字段名 = a.name ,
 9         标识 = CASE WHEN COLUMNPROPERTY(a.id, a.name, ‘IsIdentity‘) = 1 THEN ‘√‘
10                   ELSE ‘‘
11              END ,
12         主键 = CASE WHEN EXISTS ( SELECT  1
13                                 FROM    sysobjects
14                                 WHERE   xtype = ‘PK‘
15                                         AND name IN (
16                                         SELECT  name
17                                         FROM    sysindexes
18                                         WHERE   indid IN (
19                                                 SELECT  indid
20                                                 FROM    sysindexkeys
21                                                 WHERE   id = a.id
22                                                         AND colid = a.colid ) ) )
23                   THEN ‘√‘
24                   ELSE ‘‘
25              END ,
26         类型 = b.name ,
27         占用字节数 = a.length ,
28         长度 = COLUMNPROPERTY(a.id, a.name, ‘PRECISION‘) ,
29         小数位数 = ISNULL(COLUMNPROPERTY(a.id, a.name, ‘Scale‘), 0) ,
30         允许空 = CASE WHEN a.isnullable = 1 THEN ‘√‘
31                    ELSE ‘‘
32               END ,
33         默认值 = ISNULL(e.text, ‘‘) ,
34         字段说明 = ISNULL(g.[value], ‘‘)
35 FROM    syscolumns a
36         LEFT JOIN systypes b ON a.xtype = b.xusertype
37         INNER JOIN sysobjects d ON a.id = d.id
38                                    AND d.xtype = ‘U‘
39                                    AND d.name <> ‘dtproperties‘
40         LEFT JOIN syscomments e ON a.cdefault = e.id
41         LEFT JOIN sys.extended_properties g ON a.id = g.major_id
42                                                AND a.colid = g.minor_id
43         LEFT JOIN sys.extended_properties f ON d.id = f.major_id
44                                                AND f.minor_id = 0
45
46 --where d.name=‘要查询的表‘ --如果只查询指定表,加上此条件
47 ORDER BY a.id ,
48         a.colorder 

结果：