SQLForeignKeys以标准结果集的形式返回结果。 如果请求与主键关联的外键,则按FKTABLE_CAT、FKTABLE_SCHEM、FKTABLE_NAME和KEY_SEQ对结果集进行排序。 如果请求与外键关联的主键,则按PKTABLE_CAT、PKTABLE_SCHEM、PKTABLE_NAME和KEY_SEQ对结果集进行排序。 下表列出了结果集中的列。
KEY_SEQ smallint Sequence number of the column in a multicolumn primary key. This field always returns a value. UPDATE_RULE smallint Action applied to the foreign key when the SQL operation is an update. SQL Server returns 0, 1, or 2 for these columns: ...
ERROR1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`test`.`subtb`, CONSTRAINT `subtb_ibfk_1` FOREIGN KEY (`rootid`) REFERENCES `roottb` (`id`) ON DELETE CASCADE) mysql> FOREIGN KEY reference UNIQUE KEY not primary CREATETABLEroottb3 ( idINT(11) ...
KEY_SEQsmallintSequence number of the column in a multicolumn primary key. This field always returns a value. UPDATE_RULEsmallintAction applied to the foreign key when the SQL operation is an update. SQL Server returns 0, 1, or 2 for these columns: ...
In addition, MySQL 9.2 allows implicit references to the parent table's primary key. This means that the following syntax is valid: CREATE TABLE person ( id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT, name CHAR(60) NOT NULL, PRIMARY KEY (id) ); CREATE TABLE shirt ( id SMALLINT UNSIGNED...
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: ...
Partitioned tablescannot contain foreign keys, and cannot be referenced by a foreign key. Syntax Note:MariaDB accepts the REFERENCES clause in ALTER TABLE and CREATE TABLE statements, but that syntax does nothing. MariaDB simply parses it without returning any error or warning, for compatibility ...
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...
[CONSTRAINT constraint_name] {PRIMARY KEY | UNIQUE} (column_name) [NOT ENFORCED [ENABLE QUERY OPTIMIZATION | DISABLE QUERY OPTIMIZATION] | ENFORCED] Parameter Description IF NOT EXISTS Does not throw an error if a table with the same name exists. A notice is issued in this case. table_...
[ERR] 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 '; SET FOREIGN_KEY_CHECKS = 1' at line 1 一般是脚本编码的问题,ultraedit的UTF8编码是UTF8 BOM,UE编辑器调整为UTF8编码格式后,保存的文件...