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35 lines
927 B
Plaintext
35 lines
927 B
Plaintext
#
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# Init section
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#
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drop table if exists t1;
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#
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# Simple IF tests
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#
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select IF(0,"ERROR","this"),IF(1,"is","ERROR"),IF(NULL,"ERROR","a"),IF(1,2,3)|0,IF(1,2.0,3.0)+0 ;
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#
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# Test of IF and case-sensitiveness
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#
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CREATE TABLE t1 (st varchar(255) NOT NULL, u int(11) NOT NULL) TYPE=MyISAM;
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INSERT INTO t1 VALUES ('a',1),('A',1),('aa',1),('AA',1),('a',1),('aaa',0),('BBB',0);
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select if(1,st,st) s from t1 order by s;
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select if(u=1,st,st) s from t1 order by s;
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select if(u=1,binary st,st) s from t1 order by s;
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select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
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drop table t1;
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#
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# Problem with IF()
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#
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create table t1 (num double(12,2));
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insert into t1 values (144.54);
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select sum(if(num is null,0.00,num)) from t1;
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drop table t1;
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create table t1 (x int, y int);
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insert into t1 values (0,6),(10,16),(20,26),(30,10),(40,46),(50,56);
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select min(if(y -x > 5,y,NULL)), max(if(y - x > 5,y,NULL)) from t1;
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drop table t1;
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