/notes/code/sql/HW_AdvancedFK.sql (92cdb354c483bb01d7ffc0d57a82b8de980c8eb7) (643 bytes) (mode 100644) (type blob)
DROP SCHEMA IF EXISTS HW_AdvancedFK;
CREATE SCHEMA HW_AdvancedFK;
USE HW_AdvancedFK;
-- start snippet advancedFK
/* code/sql/HW_AdvancedFK.sql */
CREATE TABLE T1 (
A1 INT,
A2 INT,
B INT,
PRIMARY KEY (A1, A2)
);
CREATE TABLE T2 (
A1 INT,
A2 INT,
B1 INT PRIMARY KEY,
B2 INT,
-- We can create a "pair" of foreign key in one line, as
-- follows:
FOREIGN KEY (A1, A2) REFERENCES T1 (A1, A2),
-- We can create a foreign key that references the primary
-- key of the table we are currently creating, and name
-- it, as follows:
CONSTRAINT My_pk_to_T1 FOREIGN KEY (B2) REFERENCES T2 (B1)
);
-- end snippet advancedFK
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CONTRIB.md |
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blob |
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KNOWN_BUGS.md |
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LICENSE.md |
100644 |
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Makefile |
100644 |
blob |
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README.md |
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tree |
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install |
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notes |
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