"on delete cascade" Code Answer's
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sql cascade delete sql
Upset Unicorn
on May 26, 2021
ALTER TABLE dbo.T2
DROP CONSTRAINT FK_T1_T2 -- or whatever it's called
ALTER TABLE dbo.T2
ADD CONSTRAINT FK_T1_T2_Cascade
FOREIGN KEY (EmployeeID) REFERENCES dbo.T1(EmployeeID) ON DELETE CASCADE
Source: stackoverflow.com
on delete of foreign key delete corresponding rows in other table
Xenophobic Xenomorph
on Jun 10, 2020
ALTER TABLE ReferencingTable DROP
CONSTRAINT fk__ReferencingTable__MainTable;
ALTER TABLE ReferencingTable ADD
CONSTRAINT fk__ReferencingTable__MainTable
FOREIGN KEY (pk_col_1)
REFERENCES MainTable (pk_col_1)
ON DELETE CASCADE;Source: stackoverflow.com
on delete cascade
Grieving Grivet
on Nov 11, 2020
CREATE TABLE child_table
(
column1 datatype [ NULL | NOT NULL ],
column2 datatype [ NULL | NOT NULL ],
...
CONSTRAINT fk_name
FOREIGN KEY (child_col1, child_col2, ... child_col_n)
REFERENCES parent_table (parent_col1, parent_col2, ... parent_col_n)
ON DELETE CASCADE
[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]
);Source: www.techonthenet.com
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