• 2022-05-31 问题

    “Aligned” method in the "Insert constraint" . The axis directions of the two columns are the same, that is, the combination of "shoulder to shoulder" mate constraint and axis coincident constraint. Its icon is: A: [img=73x34]1803a1766d2b1c1.png[/img] B: [img=73x34]1803a17676f8a51.png[/img] C: [img=73x34]1803a17680411b8.png[/img] D: [img=73x34]1803a17688eea25.png[/img]

    “Aligned” method in the "Insert constraint" . The axis directions of the two columns are the same, that is, the combination of "shoulder to shoulder" mate constraint and axis coincident constraint. Its icon is: A: [img=73x34]1803a1766d2b1c1.png[/img] B: [img=73x34]1803a17676f8a51.png[/img] C: [img=73x34]1803a17680411b8.png[/img] D: [img=73x34]1803a17688eea25.png[/img]

  • 2022-06-11 问题

    以下哪条命令用于删除一个约束()。 A: Alter TABLE MODIFY CONSTRAINT B: Drop CONSTRAINT C: Alter TABLE Drop CONSTRAINT D: Alter CONSTRAINT Drop

    以下哪条命令用于删除一个约束()。 A: Alter TABLE MODIFY CONSTRAINT B: Drop CONSTRAINT C: Alter TABLE Drop CONSTRAINT D: Alter CONSTRAINT Drop

  • 2022-06-07 问题

    A movement upward along an upward sloping Engel curve corresponds to A: upward sloping indifference curves. B: crossing indifference curves. C: a rotation in the budget constraint. D: a parallel shift in the budget constraint.

    A movement upward along an upward sloping Engel curve corresponds to A: upward sloping indifference curves. B: crossing indifference curves. C: a rotation in the budget constraint. D: a parallel shift in the budget constraint.

  • 2022-07-23 问题

    ( )使用源对象的位置来约束被约束对象的位置 A: 3 Points Const B: Position Constraint C: Rotation Constraint D: Range Constraint

    ( )使用源对象的位置来约束被约束对象的位置 A: 3 Points Const B: Position Constraint C: Rotation Constraint D: Range Constraint

  • 2022-06-12 问题

    删除约束用什么语句 A: delete B: delete constraint C: drop D: drop constraint

    删除约束用什么语句 A: delete B: delete constraint C: drop D: drop constraint

  • 2022-06-08 问题

    如果要删除表中的约束,应该使用( ) A: ALTER TABLE 表名DROP CONSTRAINT 约束名 B: DROP CONSTRAINT 约束名 C: DELETE CONSTRAINT 约束名 D: ALTER TABLE 表名DELETE CONSTRAINT 约束名

    如果要删除表中的约束,应该使用( ) A: ALTER TABLE 表名DROP CONSTRAINT 约束名 B: DROP CONSTRAINT 约束名 C: DELETE CONSTRAINT 约束名 D: ALTER TABLE 表名DELETE CONSTRAINT 约束名

  • 2022-07-25 问题

    下列 CHECK 约束条件中哪个总是有效的?&#91; &#93; A: CONSTRAINT gender_chk CHECK(gender IN (N'男',N'女')) B: CONSTRAINT birthday_chk CHECK(birthday > GETDATE()) C: CONSTRAINT mark_chk CHECK(mark<560) D: CONSTRAINT address_chk CHECK(address LIKE N'广州市%')

    下列 CHECK 约束条件中哪个总是有效的?&#91; &#93; A: CONSTRAINT gender_chk CHECK(gender IN (N'男',N'女')) B: CONSTRAINT birthday_chk CHECK(birthday > GETDATE()) C: CONSTRAINT mark_chk CHECK(mark<560) D: CONSTRAINT address_chk CHECK(address LIKE N'广州市%')

  • 2022-07-25 问题

    删除PRIMARYKEY约束条件及其所有依赖约束条件的语法是什么() A: AALTER TABLE table_name DROP CONSTRAINT constraint_name CASCADE B: BALTER TABLE table_name DROP CONSTRAINT FOREIGN KEY CASCADE C: CDROP CONSTRAINT table_name(constraint_name) D: DALTER TABLE table_name DROP CONSTRAINT constraint_name

    删除PRIMARYKEY约束条件及其所有依赖约束条件的语法是什么() A: AALTER TABLE table_name DROP CONSTRAINT constraint_name CASCADE B: BALTER TABLE table_name DROP CONSTRAINT FOREIGN KEY CASCADE C: CDROP CONSTRAINT table_name(constraint_name) D: DALTER TABLE table_name DROP CONSTRAINT constraint_name

  • 2022-06-07 问题

    删除STUDENT表中C2的默认值约束语句是()。 A: ALTER TABLE STUDENT DROP CONSTRAINT C2 B: DROP CONSTRAINT C2 C: DELETE CONSTRAINT C2 D: DROP STUDENT

    删除STUDENT表中C2的默认值约束语句是()。 A: ALTER TABLE STUDENT DROP CONSTRAINT C2 B: DROP CONSTRAINT C2 C: DELETE CONSTRAINT C2 D: DROP STUDENT

  • 2022-06-07 问题

    以下定义外键约束名称正确的是()。 A: CONSTRAINT’FK_ID’ B: CONSTRAINT"FK_ID" C: CONSTRAINTFK_ID D: 以上答案都不正确

    以下定义外键约束名称正确的是()。 A: CONSTRAINT’FK_ID’ B: CONSTRAINT"FK_ID" C: CONSTRAINTFK_ID D: 以上答案都不正确

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