sql server递归子节点、父节点sql查询表结构的实例

一、查询当前部门下的所有子部门

WITH  dept
    AS ( SELECt  *
 FROM   dbo.deptTab --部门表
 WHERe  pid = @id
 UNIOn ALL
 SELECt  d.*
 FROM   dbo.deptTab d
     INNER JOIN dept ON d.pid = dept.id
)
  SELECt *
  FROM  dept

二、查询当前部门所有上级部门

WITH  tab
     AS ( SELECt  DepId ,
     ParentId ,
     DepName ,
     [Enable] ,
     0 AS [Level]
 FROM   deptTab WITH ( NOLOCK ) --表名
 WHERe  [Enable] = 1
     AND depId = @depId
 UNIOn ALL
 SELECt  b.DepId ,
     b.ParentId ,
     b.DepName ,
     b.[Enable] ,
     a.[Level] + 1
 FROM   tab a ,
     deptTab b WITH ( NOLOCK )
 WHERe  a.ParentId = b.depId
     AND b.[enable] = 1
)
  SELECt *
  FROM  tab WITH ( NOLOCK )
  WHERe  [enable] = 1
  ORDER BY [level] DESC

三、查询当前表的说明描述

SELECt tbs.name 表名 ,
    ds.value 描述
FROM  sys.extended_properties ds
    LEFT JOIN sysobjects tbs ON ds.major_id = tbs.id
WHERe  ds.minor_id = 0
    AND tbs.name = 'userTab';--表名

四、查询当前表的表结构(字段名、属性、默认值、说明等)

SELECt CASE WHEN col.colorder = 1 THEN obj.name
ELSE ''
    END AS 表名 ,
    col.colorder AS 序号 ,
    col.name AS 列名 ,
    ISNULL(ep.[value], '') AS 列说明 ,
    t.name AS 数据类型 ,
    col.length AS 长度 ,
    ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,
    CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '√'
ELSE ''
    END AS 标识 ,
    CASE WHEN EXISTS ( SELECT  1
FROM   dbo.sysindexes si
    INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id
   AND si.indid = sik.indid
    INNER JOIN dbo.syscolumns sc ON sc.id = sik.id
   AND sc.colid = sik.colid
    INNER JOIN dbo.sysobjects so ON so.name = si.name
   AND so.xtype = 'PK'
WHERe  sc.id = col.id
    AND sc.colid = col.colid ) THEN '√'
ELSE ''
    END AS 主键 ,
    CASE WHEN col.isnullable = 1 THEN '√'
ELSE ''
    END AS 允许空 ,
    ISNULL(comm.text, '') AS 默认值
FROM  dbo.syscolumns col
    LEFT JOIN dbo.systypes t ON col.xtype = t.xusertype
    INNER JOIN dbo.sysobjects obj ON col.id = obj.id
AND obj.xtype = 'U'
AND obj.status >= 0
    LEFT JOIN dbo.syscomments comm ON col.cdefault = comm.id
    LEFT JOIN sys.extended_properties ep ON col.id = ep.major_id
    AND col.colid = ep.minor_id
    AND ep.name = 'MS_Description'
    LEFT JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
     AND epTwo.minor_id = 0
     AND epTwo.name = 'MS_Description'
WHERe  obj.name = 'userTab'--表名(点此修改) 
ORDER BY col.colorder;

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