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SQL Server:您能帮我处理这个查询吗?

information-schema sql-server-2008

rlb.usa · 技术社区 · 15 年前

我想在我们的SQL Server 2008数据库服务器上运行诊断报告。

我正在循环访问所有数据库,然后对于每个数据库,我想查看每个表。但是,当我去看每张桌子时 tbl_cursor ,它总是在数据库中提取表 'master' .

我想是因为我 光标游标 选择:

    SELECT table_name FROM information_schema.tables WHERE table_type = 'base table'

我该怎么解决这个问题?

以下是整个代码:

SET NOCOUNT ON

DECLARE @table_count INT
DECLARE @db_cursor VARCHAR(100)
DECLARE database_cursor CURSOR FOR
SELECT name FROM sys.databases where name<>N'master'
OPEN database_cursor
FETCH NEXT FROM database_cursor INTO @db_cursor
WHILE @@Fetch_status = 0
BEGIN

    PRINT @db_cursor    
    SET @table_count = 0

    DECLARE @table_cursor VARCHAR(100)
    DECLARE tbl_cursor CURSOR FOR
    SELECT table_name FROM information_schema.tables WHERE table_type = 'base table'
    OPEN tbl_cursor
    FETCH NEXT FROM tbl_cursor INTO @table_cursor
    WHILE @@Fetch_status = 0
    BEGIN

        DECLARE @table_cmd NVARCHAR(255)
        SET @table_cmd = N'IF NOT EXISTS( SELECT TOP(1) *  FROM ' + @table_cursor + ') PRINT N''     Table ''''' + @table_cursor + ''''' is empty'' '
        --PRINT @table_cmd --debug
        EXEC sp_executesql @table_cmd
        SET @table_count = @table_count + 1

    FETCH NEXT FROM tbl_cursor INTO @table_cursor
    END
    CLOSE tbl_cursor
    DEALLOCATE tbl_cursor

    PRINT @db_cursor + N' Total Tables : ' + CAST( @table_count as varchar(2) ) 
    PRINT N'' -- print another blank line   
    SET @table_count = 0    

FETCH NEXT FROM database_cursor INTO @db_cursor
END
CLOSE database_cursor
DEALLOCATE database_cursor




SET NOCOUNT OFF

3 回复 | 直到 15 年前

AdaTheDev 15 年前

问题是因为您实际上总是在master db上下文下运行information\schema.tables查询。

您需要将tbl_光标块转换为动态SQL,以便使用db名称完全限定查询。

例如

SELECT table_name FROM YourDatabase.INFORMATION_SCHEMA.TABLES WHERE....

基本上就是您需要为该光标执行的操作。

gbn 15 年前

使用表变量更容易,因此可以使用另一个动态SQL语句向@tablist添加行。

SET NOCOUNT ON

DECLARE @table_count INT
DECLARE @dblist TABLE (DBName VARCHAR(100))
DECLARE @tablist TABLE (TableName VARCHAR(100))
DECLARE @dbname varchar(100), @tabname varchar(100)

INSERT @dblist 
SELECT name FROM sys.databases where name<>N'master'

SELECT TOP 1 @dbname = DBName FROM @dblist
WHILE @@ROWCOUNT <> 0
BEGIN

    INSERT @tablist (tableName)
    EXEC ('SELECT table_name FROM ' + @dbname + '.information_schema.tables WHERE table_type = ''base table'' ')

    SELECT TOP 1 @tabname = tableName FROM @tablist
    WHILE @@ROWCOUNT <> 0
    BEGIN

--do my stuff

        DELETE @tablist WHERE tableName =  @tabname
        SELECT TOP 1 @tabname = tableName FROM @tablist
    END

    DELETE @dblist WHERE DBName =  @dbname
    SELECT TOP 1 @dbname = DBName FROM @dblist
END

Sundararajan S 15 年前

您可能需要创建动态SQL。因为信息模式将只从运行此查询的当前活动数据库中获取对象。

您可以尝试sys.objects