SQLServer很有用的查询语句

1、索引相关查询

SELECT 
 表名=CASE WHEN C.column_id=1 THEN O.name ELSE N'' END, 
 表说明=ISNULL(CASE WHEN C.column_id=1 THEN PTB.[value] END,N''), 
 字段序号=C.column_id, 
 字段名=C.name,
 主键=ISNULL(IDX.PrimaryKey,N''), 
 标识=CASE WHEN C.is_identity=1 THEN N'√'ELSE N'' END, 
 计算列=CASE WHEN C.is_computed=1 THEN N'√'ELSE N'' END, 
 类型=T.name, 
 长度=C.max_length, 
 精度=C.precision, 
 小数位数=C.scale, 
 允许空=CASE WHEN C.is_nullable=1 THEN N'√'ELSE N'' END, 
 默认值=ISNULL(D.definition,N''), 
 字段说明=ISNULL(PFD.[value],N''), 
 索引名=ISNULL(IDX.IndexName,N''), 
 索引排序=ISNULL(IDX.Sort,N''), 
 创建时间=O.Create_Date, 
 修改时间=O.Modify_date 
FROM sys.columns C 
 INNER JOIN sys.objects O 
     ON C.[object_id]=O.[object_id] 
         AND O.type='U' 
         AND O.is_ms_shipped=0 
 INNER JOIN sys.types T 
     ON C.user_type_id=T.user_type_id 
 LEFT JOIN sys.default_constraints D 
     ON C.[object_id]=D.parent_object_id 
         AND C.column_id=D.parent_column_id 
         AND C.default_object_id=D.[object_id] 
LEFT JOIN sys.extended_properties PFD 
     ON PFD.class=1 
         AND C.[object_id]=PFD.major_id 
         AND C.column_id=PFD.minor_id 
--             AND PFD.name='Caption'  -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述) 
 LEFT JOIN sys.extended_properties PTB 
     ON PTB.class=1 
         AND PTB.minor_id=0 
         AND C.[object_id]=PTB.major_id 
--             AND PFD.name='Caption'  -- 表说明对应的描述名称(一个表可以添加多个不同name的描述) 
 LEFT JOIN                       -- 索引及主键信息 
 ( 
     SELECT 
         IDXC.[object_id], 
         IDXC.column_id, 
         Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescending') 
             WHEN 1 THEN 'DESC' WHEN 0 THEN 'ASC' ELSE '' END, 
         PrimaryKey=CASE WHEN IDX.is_primary_key=1 THEN N'√'ELSE N'' END, 
         IndexName=IDX.Name 
     FROM sys.indexes IDX 
     INNER JOIN sys.index_columns IDXC 
ON IDX.[object_id]=IDXC.[object_id] 
             AND IDX.index_id=IDXC.index_id 
     LEFT JOIN sys.key_constraints KC 
         ON IDX.[object_id]=KC.[parent_object_id] 
             AND IDX.index_id=KC.unique_index_id 
     INNER JOIN  -- 对于一个列包含多个索引的情况,只显示第1个索引信息 
     ( 
         SELECT [object_id], Column_id, index_id=MIN(index_id) 
         FROM sys.index_columns 
         GROUP BY [object_id], Column_id 
     ) IDXCUQ 
         ON IDXC.[object_id]=IDXCUQ.[object_id] 
             AND IDXC.Column_id=IDXCUQ.Column_id 
             AND IDXC.index_id=IDXCUQ.index_id 
 ) IDX 
     ON C.[object_id]=IDX.[object_id] 
         AND C.column_id=IDX.column_id 
--WHERE O.name = 'KPI_ECSSSnapshot'
--如果只查询指定表,加上此条件 
ORDER BY O.name,C.column_id 

2、触发器相关查询

查看当前库中所有的触发器:

 SELECT * FROM Sysobjects WHERE xtype = 'TR' 

查看当前库中所有的触发器和与之相对应的表：

SELECT tb2.name AS tableName,tb1.name AS triggerName FROM Sysobjects tb1 JOIN Sysobjects tb2 ON tb1.parent_obj=tb2.id WHERE tb1.type='TR'