Here, the SQL command adds thePRIMARY KEYconstraint to thecollege_idcolumn in the existingCollegestable. For Multiple Columns ALTERTABLECollegesADDCONSTRAINTCollegePK PRIMARYKEY(college_id, college_code); Here, the SQL command adds thePRIMARY KEYconstraint to thecollege_idandcollege_idcolumns in the ...
In this context, default is not a keyword; it is an identifier for the default filegroup and must be delimited, as in ON"default"or ON[default]. If"default"is specified, the QUOTED_IDENTIFIER option must be ON for the current session. This is the default setting. ...
In this context, default, is not a keyword. It is an identifier for the default filegroup and must be delimited, as in ON "default" or ON [default]. If "default" is specified, the QUOTED_IDENTIFIER option must be ON for the current session. This is the default setting. For more info...
not a keyword. It is an identifier for the default filegroup and must be delimited, as inON defaultorON [default]. Ifdefaultis specified, theQUOTED_IDENTIFIERoption must be ON for the current session. This is the default setting. For more information, seeSET QUOTED_IDENTIFIER (Transact-SQL)...
# also correct; backticks on either object (in case it’s a keyword) ALTER TABLE child ADD FOREIGN KEY (parent_id) REFERENCES parent(`id`); 3.约束引用中的本地键、外部表或列有错字 如何诊断:执行show tables、show columns进行比较 如何解决:找出并修复错字 ...
If you define aCHECKconstraint on a table it can limit the values in certain columns based on values in other columns in the row. SQL CHECK on CREATE TABLE The following SQL creates aCHECKconstraint on the "Age" column when the "Persons" table is created. TheCHECKconstraint ensures that ...
In this context, default is not a keyword; it is an identifier for the default filegroup and must be delimited, as in ON"default"or ON[default]. If"default"is specified, the QUOTED_IDENTIFIER option must be ON for the current session. This is the default setting. ...
# also correct; backticks on either object (in case it’s a keyword) ALTER TABLE child ADD FOREIGN KEY (parent_id) REFERENCES parent(`id`); 3.约束引用中的本地键、外部表或列有错字 如何诊断:执行show tables、show columns进行比较 如何解决:找出并修复错字 ...
query failed: ALTER TABLE "data_table_grant_permissions_script" ALTER COLUMN "environment" nvarchar(255) CONSTRAINT CHK_83191b32c3acc65e3b8735d35a_ENUM CHECK(environment IN ('production','development')) error: { RequestError: Incorrect syntax near the keyword 'CONSTRAINT'. at handleError (C:\...
KeywordCasing KillQueryNotificationSubscriptionStatement KillStatement KillStatsJobStatement LabelStatement LedgerOption LedgerTableOption LedgerViewOption LeftFunctionCall LikePredicate LineNoStatement ListenerIPEndpointProtocolOption ListTypeCopyOption 常值 LiteralAtomicBlockOption LiteralAuditTargetOp...