sql server递归子节点、父节点sql查询表结构的实例

太阳不下山

　　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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