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32 lines
712 B
Plaintext
32 lines
712 B
Plaintext
DROP TABLE IF EXISTS t1,t2;
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CREATE TABLE t1 (
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ID int(11) NOT NULL auto_increment,
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NAME varchar(75) DEFAULT '' NOT NULL,
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LINK_ID int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (ID),
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KEY NAME (NAME),
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KEY LINK_ID (LINK_ID)
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);
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INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (1,'Mike',0);
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INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (2,'Jack',0);
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INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (3,'Bill',0);
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CREATE TABLE t2 (
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ID int(11) NOT NULL auto_increment,
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NAME varchar(150) DEFAULT '' NOT NULL,
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PRIMARY KEY (ID),
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KEY NAME (NAME)
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);
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@r/sel000100.result SELECT DISTINCT
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t2.id AS key_link_id,
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t2.name AS link
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FROM t1
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LEFT JOIN t2 ON t1.link_id=t2.id
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GROUP BY t1.id
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ORDER BY link;
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drop table t1,t2;
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