Question

我希望删除所选表格中值=。

的所有行

这将为我提供我需要查看的所有表格

SELECT t.name AS table_name
  FROM sys.tables AS t
  INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
  WHERE c.name = 'CampusID'
  ORDER BY table_name

但现在我试图在每个表中搜索CampusID中的值并删除该行。

感谢您的帮助。

Answer 1

您可以使用动态SQL生成语句

SELECT 
'delete from ' + t.name + ' where CampusId = ' + cast(123 as varchar(8))
  FROM sys.tables AS t
  INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
  WHERE c.name = 'FundID'
  ORDER BY t.name

根据您的价值使用适当的铸造。然后你可以把所有这些语句一起执行（在一个事务中）或者一个接一个地执行它们。

如果您想通过脚本执行 all ，可以使用此答案How to concat many rows into one string in SQL Server 2008?将结果合并为一个字符串，然后使用sp_executesql执行生成的脚本

Answer 2

您可以连接要运行的代码，例如：

SELECT  'DELETE FROM ' + QUOTENAME(t.name) + 
        ' WHERE ''CampusID'' = YourValue;' AS table_name
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name = 'CampusID'
ORDER BY table_name;

然后复制粘贴结果并运行它

Answer 3

快速把它扔到一起。在此，您将遍历所有表/列并使用动态sql删除需要转换的值。我使用这样的查询来做你想做的事。我没有测试这个实际查询，因此您必须根据需要进行测试。

DECLARE @loopCount      INT
DECLARE @tableName      NVARCHAR(128)
DECLARE @columnName     NVARCHAR(128)
DECLARE @strSQL         NVARCHAR(MAX);

CREATE TABLE #tempTable (id INT IDENTITY(1,1), tableName VARCHAR(128), tableCol VARCHAR(128)

INSERT INTO #tempTable(tableName, tableCol)
SELECT t.name AS table_name, c.name
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name = 'CampusID'

--Set a loopCount for while loop
SET @loopCount = 1

    --Use the while loop to to loop through tables
        while ( exists(SELECT id FROM #tempTable WHERE id = @loopCount) )
            BEGIN

                --Get current record in temp table
                SELECT  @tableName      = t.tableName
                        @columnName     = t.tableCol
                FROM #tempTable t
                WHERE t.id = @loopCount
                -----------------------------------------------------------         

                SET @strSQL = 'DELETE FROM ' + @tableName + ' WHERE ' + @columnName + ' = ' + CONVERT(NVARCHAR(MAX), VALUEHERE)
                EXEC sp_executesql @strSQL, N'@tableName varchar(128), @columnName varchar(128)', @tableName = @tableName, @columnName = @columnName

                DELETE FROM #tempTable WHERE id = @loopCount

                SET @loopCount = @loopCount + 1
            END


DROP TABLE #temptable

Answer 4

以下是使用动态sql完成此任务的完整工作示例。

declare @SQL nvarchar(max) = N''
    , @ValueToDelete nvarchar(25) = N'Some Value'

SELECT @SQL = @SQL + N'DELETE FROM ' + QUOTENAME(t.name) + 
        N' WHERE CampusID = ''' + @ValueToDelete + N''';'
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name = 'CampusID'

exec sp_executesql @SQL

在所有表中搜索具有列名称的值

4 个答案: