24 lines
720 B
MySQL
24 lines
720 B
MySQL
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-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
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-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
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DROP TABLE t_child;
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DROP TABLE t_parent;
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CREATE TABLE t_parent(a INT PRIMARY KEY);
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CREATE TABLE t_child(b INT, c INT, FOREIGN KEY (c) REFERENCES t_parent(a));
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INSERT INTO t_parent SELECT rownum FROM dual CONNECT BY LEVEL<=10;
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INSERT INTO t_child SELECT rownum, MOD(rownum,9)+1 FROM dual CONNECT BY LEVEL <= 10;
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COMMIT;
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PAUSE Press enter to update CHILD table:
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PROMPT UPDATE t_child SET c = 10 WHERE c = 1;;
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UPDATE t_child SET c = 10 WHERE c = 1;
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PROMPT -- In another session run:
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PROMPT UPDATE t_parent SET a = 7 WHERE a = 6;;
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PROMPT
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