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[SQL Server Delete with Join]( [Understanding Foreign Key Constraint in SQL Server](
在SQL Server中,UPDATE和DELETE语句是可以结合INNER/LEFT/RIGHT/FULL JOIN来使用的。 我们首先在数据库中新建两张表: [T_A] CREATETABLE[dbo].[T_A]([ID][int]NOTNULL,[Name][nvarchar](50)NULL,[Age][int]NULL,CONSTRAINT[PK_T_A]PRIMARYKEYCLUSTERED([ID]ASC)WITH(PAD_INDEX=OFF, STATISTICS_NORECOMPU...
SQL USEAdventureWorks2022; GO-- Return the name of primary key.SELECTnameFROMsys.key_constraintsWHEREtype='PK'ANDOBJECT_NAME(parent_object_id) = N'TransactionHistoryArchive'; GO 若要创建DROP脚本,请使用上一个查询的结果。 将<primary-key-constraint>替换为正确的值。 它看起来可能类似于PK_Transaction...
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If the DELETE removes multiple rows, and any one of the removed rows violates a trigger or constraint, the statement is canceled, an error is returned, and no rows are removed.When a DELETE statement encounters an arithmetic error (overflow, divide by zero, or a domain error) occurring ...
TheDELETEstatement may fail if it violates a trigger or tries to remove a row referenced by data in another table with aFOREIGN KEYconstraint. If theDELETEremoves multiple rows, and any one of the removed rows violates a trigger or constraint, the statement is canceled, an error is returned...
Use SQL Server Management Studio Delete a primary key constraint using Object Explorer In Object Explorer, expand the table that contains the primary key and then expandKeys. Right-click the key and selectDelete. In theDelete Objectdialog box, verify the correct key is specified and selectOK. ...
You can't delete a column that has a CHECK constraint. You must first delete the constraint.You can't delete a column that has PRIMARY KEY or FOREIGN KEY constraints or other dependencies except when using the Table Designer in SSMS. When using Object Explorer in SSMS or Transact-SQL, you...
You can't delete a column that has aCHECKconstraint. You must first delete the constraint. You can't delete a column that hasPRIMARY KEYorFOREIGN KEYconstraints or other dependencies except when using theTable Designerin SSMS. When usingObject Explorerin SSMS or Transact-SQL, you must first ...