create table repo_table( repo_id char(13) not null primary key, repo_name char(14) not null) type=innodb; 创建表2 mysql> create table busi_table( -> busi_id char(13) not null primary key, -> busi_name char(13) not null, -> repo_id char(13) not null, -> foreign key(repo_...
SQLForeignKeys會以標準結果集的形式傳回結果。 如果要求與主鍵相關聯的外鍵,結果集會依FKTABLE_CAT、FKTABLE_SCHEM、FKTABLE_NAME和KEY_SEQ排序。 如果要求與外鍵相關聯的主鍵,結果集會依PKTABLE_CAT、PKTABLE_SCHEM、PKTABLE_NAME和KEY_SEQ排序。 下表列出結果集中的資料行。
SQLForeignKeys 會以標準結果集的形式傳回結果。 如果要求與主鍵相關聯的外鍵,結果集會依FKTABLE_CAT、FKTABLE_SCHEM、FKTABLE_NAME和KEY_SEQ排序。 如果要求與外鍵相關聯的主鍵,結果集會依PKTABLE_CAT、PKTABLE_SCHEM、PKTABLE_NAME和KEY_SEQ排序。 下表列出結果集中的資料行。
In SQL, theFOREIGN KEYconstraint is used to create a relationship between two tables. A foreign key is defined using theFOREIGN KEYandREFERENCESkeywords. Example -- this table doesn't contain foreign keysCREATETABLECustomers (idINTEGERPRIMARYKEY,nameVARCHAR(100), ageINTEGER);-- create another tabl...
The SQL FOREIGN KEY CONSTRAINT is used to ensure the referential integrity of the data in one table to match values in another table.
SQL Server는 제약 조건 PRIMARY KEY 이름을 반환합니다. DEFERRABILITY smallint 제약 조건 검사를 지연할 수 있는지 여부를 나타냅니다.결과 집합 FK_NAME 에서 열과 PK_NAME 열은 항상 반환 NULL됩니...
SQL Server / Oracle / MS Access: CREATETABLEOrders ( OrderID intNOTNULLPRIMARYKEY, OrderNumber intNOTNULL, PersonID intFOREIGNKEYREFERENCESPersons(PersonID) ); To allow naming of aFOREIGN KEYconstraint, and for defining aFOREIGN KEYconstraint on multiple columns, use the following SQL syntax: ...
然后再设置外键约束: SET FOREIGN_KEY_CHECKS=1; 2. MySQL 5.1.48 导入 MySQL 5.7.18 时遇到 T FOREIGN_KEY_CHECKS = 0 错误的解决方法 #1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘T FOREIGN...
然后再设置外键约束: SET FOREIGN_KEY_CHECKS=1; 2. MySQL 5.1.48 导入 MySQL 5.7.18 时遇到 T FOREIGN_KEY_CHECKS = 0 错误的解决方法 #1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘T FOREIGN...
The goals of this task are: - make foreign-key support possible for any storage engine (which could handle it) via a combination of API calls and server handling. - support SQL standard syntax instead of InnoDB syntax. I use the abbreviation FK when discussing the child / referencing table...