在實際應用中，當我們準備把一個項目移交至客戶手中使用時，我們需要把庫中所有表先前的測試數據清空，以給客戶一個干凈的數據庫，如果涉及的表很多，要一一的清空，不僅花費時間，還容易出錯以及漏刪，在這兒我提供了一個方法，可快捷有效的清空指定數據庫所有表的數據。僅供參考，歡迎交流不同意見。
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--
Remove?all?data?from?a?database
SET ?NOCOUNT? ON
-- Tables?to?ignore
DECLARE ? @IgnoreTables ?
???????? TABLE ?(TableName? varchar ( 512 ))
INSERT ? INTO ? @IgnoreTables ?(TableName)? VALUES ?( ' sysdiagrams ' )
DECLARE ? @AllRelationships ?
???????? TABLE ?(ForeignKey? varchar ( 512 )
??????????????,TableName? varchar ( 512 )
??????????????,ColumnName? varchar ( 512 )
??????????????,ReferenceTableName? varchar ( 512 )
??????????????,ReferenceColumnName? varchar ( 512 )
??????????????,DeleteRule? varchar ( 512 ))
INSERT ? INTO ? @AllRelationships
SELECT ?f.name? AS ?ForeignKey,
OBJECT_NAME (f.parent_object_id)? AS ?TableName,
COL_NAME (fc.parent_object_id,
fc.parent_column_id)? AS ?ColumnName,
OBJECT_NAME ?(f.referenced_object_id)? AS ?ReferenceTableName,
COL_NAME (fc.referenced_object_id,
fc.referenced_column_id)? AS ?ReferenceColumnName,
delete_referential_action_desc? as ?DeleteRule
FROM ?sys.foreign_keys? AS ?f
INNER ? JOIN ?sys.foreign_key_columns? AS ?fc
ON ?f. OBJECT_ID ? = ?fc.constraint_object_id
?
DECLARE ? @TableOwner ? varchar ( 512 )
DECLARE ? @TableName ? varchar ( 512 )
DECLARE ? @ForeignKey ? varchar ( 512 )
DECLARE ? @ColumnName ? varchar ( 512 )
DECLARE ? @ReferenceTableName ? varchar ( 512 )
DECLARE ? @ReferenceColumnName ? varchar ( 512 )
DECLARE ? @DeleteRule ? varchar ( 512 )
?
?
PRINT ( ' Loop?through?all?tables?and?switch?all?constraints?to?have?a?delete?rule?of?CASCADE ' )
DECLARE ?DataBaseTables0?
CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables0;?
FETCH ? NEXT ? FROM ?DataBaseTables0?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN ?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???????? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? DECLARE ?DataBaseTableRelationships? CURSOR ? FOR ?
???????? SELECT ?ForeignKey,?ColumnName,?ReferenceTableName,?ReferenceColumnName
???????? FROM ? @AllRelationships ?
???????? WHERE ?TableName? = ? @TableName
???????? OPEN ?DataBaseTableRelationships;
???????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ;
???????? IF ? @@FETCH_STATUS ? <> ? 0 ?
???????????? PRINT ? ' =====>?No?Relationships ' ?;?
???????? WHILE ? @@FETCH_STATUS ? = ? 0
???????? BEGIN
???????????? PRINT ? ' =====>?switching?delete?rule?on? ' ? + ? @ForeignKey ? + ? ' ?to?CASCADE ' ;
???????????? BEGIN ? TRANSACTION
???????????? BEGIN ?TRY
???????????????? EXEC ( '
????????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
?????????????????DROP?CONSTRAINT? ' + @ForeignKey + ' ;
????????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]?ADD?CONSTRAINT
???????????????? ' + @ForeignKey + ' ?FOREIGN?KEY
????????????????(
???????????????? ' + @ColumnName + '
????????????????)?REFERENCES? ' + @ReferenceTableName + '
????????????????(
???????????????? ' + @ReferenceColumnName + '
????????????????)?ON?DELETE?CASCADE;
???????????????? ' );
???????????????? COMMIT ? TRANSACTION
???????????? END ?TRY
???????????? BEGIN ?CATCH
???????????????? PRINT ? ' =====>?can '' t?switch? ' ? + ? @ForeignKey ? + ? ' ?to?CASCADE,?-? ' ? +
???????????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????????????? ROLLBACK ? TRANSACTION
???????????? END ?CATCH;
????????????
???????????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ;
???????? END ;
???????? CLOSE ?DataBaseTableRelationships;
???????? DEALLOCATE ?DataBaseTableRelationships;
???????? END
???????? PRINT ? '' ;
???????? PRINT ? '' ;
???????? FETCH ? NEXT ? FROM ?DataBaseTables0?
???????? INTO ? @TableOwner , @TableName ;
???? END
CLOSE ?DataBaseTables0;
DEALLOCATE ?DataBaseTables0;
PRINT ( ' Loop?though?each?table?and?DELETE?All?data?from?the?table ' )
DECLARE ?DataBaseTables1? CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables1;?
FETCH ? NEXT ? FROM ?DataBaseTables1?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN ?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???????? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? PRINT ? ' =====>?deleting?data?from?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? BEGIN ?TRY
???????????? EXEC ( '
?????????????????DELETE?FROM?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
?????????????????DBCC?CHECKIDENT?([ ' ? + ? @TableName ? + ? ' ],?RESEED,?0)
????????????????? ' );
???????? END ?TRY
???????? BEGIN ?CATCH
???????????? PRINT ? ' =====>?can '' t?FROM?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ],?-? ' ? +
?????????????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????? END ?CATCH;
???? END
?????
???? PRINT ? '' ;
???? PRINT ? '' ;
?????
???? FETCH ? NEXT ? FROM ?DataBaseTables1?
???? INTO ? @TableOwner , @TableName ;
END
CLOSE ?DataBaseTables1;
DEALLOCATE ?DataBaseTables1;?
?
PRINT ( ' Loop?through?all?tables?and?switch?all?constraints?to?have?a?delete?rule?they?had?at?the?beggining?of?the?task ' )
DECLARE ?DataBaseTables2? CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables2;?
FETCH ? NEXT ? FROM ?DataBaseTables2?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN
?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???? DECLARE ?DataBaseTableRelationships? CURSOR ? FOR ?
???? SELECT ?ForeignKey,?ColumnName,?ReferenceTableName,?ReferenceColumnName,?DeleteRule
???? FROM ? @AllRelationships ?
???? WHERE ?TableName? = ? @TableName
???? OPEN ?DataBaseTableRelationships;
???? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ,? @DeleteRule ;
???? IF ? @@FETCH_STATUS ? <> ? 0 ?
???? PRINT ? ' =====>?No?Relationships ' ?;?
???? WHILE ? @@FETCH_STATUS ? = ? 0
???? BEGIN
???????? DECLARE ? @switchBackTo ? varchar ( 50 )? =
???????? CASE ?
???????????? WHEN ? @DeleteRule ? = ? ' NO_ACTION ' ? THEN ? ' NO?ACTION '
???????????? WHEN ? @DeleteRule ? = ? ' CASCADE ' ? THEN ? ' CASCADE '
???????????? WHEN ? @DeleteRule ? = ? ' SET_NULL ' ? THEN ? ' SET?NULL '
???????????? WHEN ? @DeleteRule ? = ? ' SET_DEFAULT ' ? THEN ? ' SET?DEFAULT '
???????? END ?
???????? PRINT ? ' =====>?switching?delete?rule?on? ' ? + ? @ForeignKey ? + ? ' ?to? ' ? + ? @switchBackTo ;
???????? BEGIN ? TRANSACTION
???????? BEGIN ?TRY
???????????? EXEC ( '
????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
????????????DROP?CONSTRAINT? ' + @ForeignKey + ' ;
????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]?ADD?CONSTRAINT
???????????? ' + @ForeignKey + ' ?FOREIGN?KEY
????????????(
???????????? ' + @ColumnName + '
????????????)?REFERENCES? ' + @ReferenceTableName + '
????????????(
???????????? ' + @ReferenceColumnName + '
????????????)?ON?DELETE? ' + @switchBackTo + '
???????????? ' );
????????????
???????????? COMMIT ? TRANSACTION
???????? END ?TRY
???????? BEGIN ?CATCH
???????????? PRINT ? ' =====>?can '' t?change? ' + @ForeignKey ? + ? ' ?back?to? ' + ? @switchBackTo ? + ' ,?-? ' ? +
???????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????????? ROLLBACK ? TRANSACTION
???????? END ?CATCH;
???????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships?
???????? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ,? @DeleteRule ;
???? END ;
???? CLOSE ?DataBaseTableRelationships;
???? DEALLOCATE ?DataBaseTableRelationships;
???? END
???? PRINT ? '' ;
???? PRINT ? '' ;
???? FETCH ? NEXT ? FROM ?DataBaseTables2?
???? INTO ? @TableOwner , @TableName ;
END
CLOSE ?DataBaseTables2;
SET ?NOCOUNT? ON
-- Tables?to?ignore
DECLARE ? @IgnoreTables ?
???????? TABLE ?(TableName? varchar ( 512 ))
INSERT ? INTO ? @IgnoreTables ?(TableName)? VALUES ?( ' sysdiagrams ' )
DECLARE ? @AllRelationships ?
???????? TABLE ?(ForeignKey? varchar ( 512 )
??????????????,TableName? varchar ( 512 )
??????????????,ColumnName? varchar ( 512 )
??????????????,ReferenceTableName? varchar ( 512 )
??????????????,ReferenceColumnName? varchar ( 512 )
??????????????,DeleteRule? varchar ( 512 ))
INSERT ? INTO ? @AllRelationships
SELECT ?f.name? AS ?ForeignKey,
OBJECT_NAME (f.parent_object_id)? AS ?TableName,
COL_NAME (fc.parent_object_id,
fc.parent_column_id)? AS ?ColumnName,
OBJECT_NAME ?(f.referenced_object_id)? AS ?ReferenceTableName,
COL_NAME (fc.referenced_object_id,
fc.referenced_column_id)? AS ?ReferenceColumnName,
delete_referential_action_desc? as ?DeleteRule
FROM ?sys.foreign_keys? AS ?f
INNER ? JOIN ?sys.foreign_key_columns? AS ?fc
ON ?f. OBJECT_ID ? = ?fc.constraint_object_id
?
DECLARE ? @TableOwner ? varchar ( 512 )
DECLARE ? @TableName ? varchar ( 512 )
DECLARE ? @ForeignKey ? varchar ( 512 )
DECLARE ? @ColumnName ? varchar ( 512 )
DECLARE ? @ReferenceTableName ? varchar ( 512 )
DECLARE ? @ReferenceColumnName ? varchar ( 512 )
DECLARE ? @DeleteRule ? varchar ( 512 )
?
?
PRINT ( ' Loop?through?all?tables?and?switch?all?constraints?to?have?a?delete?rule?of?CASCADE ' )
DECLARE ?DataBaseTables0?
CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables0;?
FETCH ? NEXT ? FROM ?DataBaseTables0?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN ?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???????? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? DECLARE ?DataBaseTableRelationships? CURSOR ? FOR ?
???????? SELECT ?ForeignKey,?ColumnName,?ReferenceTableName,?ReferenceColumnName
???????? FROM ? @AllRelationships ?
???????? WHERE ?TableName? = ? @TableName
???????? OPEN ?DataBaseTableRelationships;
???????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ;
???????? IF ? @@FETCH_STATUS ? <> ? 0 ?
???????????? PRINT ? ' =====>?No?Relationships ' ?;?
???????? WHILE ? @@FETCH_STATUS ? = ? 0
???????? BEGIN
???????????? PRINT ? ' =====>?switching?delete?rule?on? ' ? + ? @ForeignKey ? + ? ' ?to?CASCADE ' ;
???????????? BEGIN ? TRANSACTION
???????????? BEGIN ?TRY
???????????????? EXEC ( '
????????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
?????????????????DROP?CONSTRAINT? ' + @ForeignKey + ' ;
????????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]?ADD?CONSTRAINT
???????????????? ' + @ForeignKey + ' ?FOREIGN?KEY
????????????????(
???????????????? ' + @ColumnName + '
????????????????)?REFERENCES? ' + @ReferenceTableName + '
????????????????(
???????????????? ' + @ReferenceColumnName + '
????????????????)?ON?DELETE?CASCADE;
???????????????? ' );
???????????????? COMMIT ? TRANSACTION
???????????? END ?TRY
???????????? BEGIN ?CATCH
???????????????? PRINT ? ' =====>?can '' t?switch? ' ? + ? @ForeignKey ? + ? ' ?to?CASCADE,?-? ' ? +
???????????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????????????? ROLLBACK ? TRANSACTION
???????????? END ?CATCH;
????????????
???????????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ;
???????? END ;
???????? CLOSE ?DataBaseTableRelationships;
???????? DEALLOCATE ?DataBaseTableRelationships;
???????? END
???????? PRINT ? '' ;
???????? PRINT ? '' ;
???????? FETCH ? NEXT ? FROM ?DataBaseTables0?
???????? INTO ? @TableOwner , @TableName ;
???? END
CLOSE ?DataBaseTables0;
DEALLOCATE ?DataBaseTables0;
PRINT ( ' Loop?though?each?table?and?DELETE?All?data?from?the?table ' )
DECLARE ?DataBaseTables1? CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables1;?
FETCH ? NEXT ? FROM ?DataBaseTables1?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN ?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???????? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? PRINT ? ' =====>?deleting?data?from?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???????? BEGIN ?TRY
???????????? EXEC ( '
?????????????????DELETE?FROM?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
?????????????????DBCC?CHECKIDENT?([ ' ? + ? @TableName ? + ? ' ],?RESEED,?0)
????????????????? ' );
???????? END ?TRY
???????? BEGIN ?CATCH
???????????? PRINT ? ' =====>?can '' t?FROM?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ],?-? ' ? +
?????????????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????? END ?CATCH;
???? END
?????
???? PRINT ? '' ;
???? PRINT ? '' ;
?????
???? FETCH ? NEXT ? FROM ?DataBaseTables1?
???? INTO ? @TableOwner , @TableName ;
END
CLOSE ?DataBaseTables1;
DEALLOCATE ?DataBaseTables1;?
?
PRINT ( ' Loop?through?all?tables?and?switch?all?constraints?to?have?a?delete?rule?they?had?at?the?beggining?of?the?task ' )
DECLARE ?DataBaseTables2? CURSOR ? FOR ?
SELECT ?SCHEMA_NAME(t.schema_id)? AS ?schema_name,?t.name? AS ?table_name
FROM ?sys.tables? AS ?t;
OPEN ?DataBaseTables2;?
FETCH ? NEXT ? FROM ?DataBaseTables2?
INTO ? @TableOwner , @TableName ;
WHILE ? @@FETCH_STATUS ? = ? 0
BEGIN
?
???? IF ?( NOT ? EXISTS ( SELECT ? TOP ? 1 ? 1 ? FROM ? @IgnoreTables ? WHERE ?TableName? = ? @TableName ))
???? BEGIN
???? PRINT ? ' [ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ] ' ;
???? DECLARE ?DataBaseTableRelationships? CURSOR ? FOR ?
???? SELECT ?ForeignKey,?ColumnName,?ReferenceTableName,?ReferenceColumnName,?DeleteRule
???? FROM ? @AllRelationships ?
???? WHERE ?TableName? = ? @TableName
???? OPEN ?DataBaseTableRelationships;
???? FETCH ? NEXT ? FROM ?DataBaseTableRelationships? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ,? @DeleteRule ;
???? IF ? @@FETCH_STATUS ? <> ? 0 ?
???? PRINT ? ' =====>?No?Relationships ' ?;?
???? WHILE ? @@FETCH_STATUS ? = ? 0
???? BEGIN
???????? DECLARE ? @switchBackTo ? varchar ( 50 )? =
???????? CASE ?
???????????? WHEN ? @DeleteRule ? = ? ' NO_ACTION ' ? THEN ? ' NO?ACTION '
???????????? WHEN ? @DeleteRule ? = ? ' CASCADE ' ? THEN ? ' CASCADE '
???????????? WHEN ? @DeleteRule ? = ? ' SET_NULL ' ? THEN ? ' SET?NULL '
???????????? WHEN ? @DeleteRule ? = ? ' SET_DEFAULT ' ? THEN ? ' SET?DEFAULT '
???????? END ?
???????? PRINT ? ' =====>?switching?delete?rule?on? ' ? + ? @ForeignKey ? + ? ' ?to? ' ? + ? @switchBackTo ;
???????? BEGIN ? TRANSACTION
???????? BEGIN ?TRY
???????????? EXEC ( '
????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]
????????????DROP?CONSTRAINT? ' + @ForeignKey + ' ;
????????????ALTER?TABLE?[ ' + @TableOwner + ' ].[ ' ? + ? @TableName ? + ? ' ]?ADD?CONSTRAINT
???????????? ' + @ForeignKey + ' ?FOREIGN?KEY
????????????(
???????????? ' + @ColumnName + '
????????????)?REFERENCES? ' + @ReferenceTableName + '
????????????(
???????????? ' + @ReferenceColumnName + '
????????????)?ON?DELETE? ' + @switchBackTo + '
???????????? ' );
????????????
???????????? COMMIT ? TRANSACTION
???????? END ?TRY
???????? BEGIN ?CATCH
???????????? PRINT ? ' =====>?can '' t?change? ' + @ForeignKey ? + ? ' ?back?to? ' + ? @switchBackTo ? + ' ,?-? ' ? +
???????????? CAST (ERROR_NUMBER()? AS ? VARCHAR )? + ? ' ?-? ' ? + ?ERROR_MESSAGE();
???????????? ROLLBACK ? TRANSACTION
???????? END ?CATCH;
???????? FETCH ? NEXT ? FROM ?DataBaseTableRelationships?
???????? INTO ? @ForeignKey ,? @ColumnName ,? @ReferenceTableName ,? @ReferenceColumnName ,? @DeleteRule ;
???? END ;
???? CLOSE ?DataBaseTableRelationships;
???? DEALLOCATE ?DataBaseTableRelationships;
???? END
???? PRINT ? '' ;
???? PRINT ? '' ;
???? FETCH ? NEXT ? FROM ?DataBaseTables2?
???? INTO ? @TableOwner , @TableName ;
END
CLOSE ?DataBaseTables2;
DEALLOCATE ?DataBaseTables2; ??
?
? 2011?? EricHu
原創作品，轉貼請注明作者和出處，留此信息。
?
------------------------------------------------
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http://www.cnblogs.com/huyong/
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http://blog.csdn.net/chinahuyong
?
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