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SQL Server中的约束是一种用于限制表中数据的规则。它们可以应用于列级别或表级别，并确保数据库中的数据遵循特定的规则和完整性要求。以下是SQL Server中常见的约束类型和使用方法的详细解释：1. 主键约束（Primary Key...

文档解释ORA-39908: Index string.string in tablespace string enforces primary constraints string of table string.string in...

文档解释ORA-39803: Data saves are not allowed on tables with partitioning referential constraints.Cause: Data saves (and...

文档解释ORA-14129: INCLUDING INDEXES must be specified as tables have enabled UNIQUE constraintsCause: Matching UNIQUE...

文档解释ORA-02444: Cannot resolve referenced object in referential constraintsCause: attempted to define foreign key...

文档解释ORA-55487: VPD constraints exist for the equivalent propertyCause: An attempt was made to make a property...

文档解释ORA-02333: cannot create constraints on attributes of this columnCause: An attempt was made to create a constraint...

文档解释ORA-38822: referential integrity constraints not allowed on editioned viewsCause: An attempt was made to create a...

文档解释ORA-02440: Create as select with referential constraints not allowedCause: create table foo (... ref. con. ...) as...

文档解释ORA-14283: UNIQUE constraints mismatch in ALTER TABLE EXCHANGE SUBPARTITIONCause: One of the tables named in the...

文档解释ORA-12046: cannot use trusted constraints for refreshing remote MVCause: REFRESH USING TRUSTED CONSTRAINTS...

文档解释ORA-14130: UNIQUE constraints mismatch in ALTER TABLE EXCHANGE PARTITIONCause: One of the tables named in the ALTER...

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文档解释ORA-01981: CASCADE CONSTRAINTS must be specified to perform this revokeCause: During this revoke some foreign key...

文档解释ORA-18120: XUDY0021 - The result XDM instance violates XDM constraintsCause: XDM instance resulting from applying...

文档解释ORA-22958: This operation is not allowed in check constraints or triggersCause: An invalid operation is used in a...

文档解释ORA-08118: Deferred FK constraints cannot be enforced, index too big (string)Cause: Deferred Foreign Key...