# Version: 3.23.29 # # Description # ----------- # Testing string functions select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo'; select 'hello' 'monty'; select length('\n\t\r\b\0\_\%\\'); select concat('monty',' was here ','again'),length('hello'),char(ascii('h')); select locate('he','hello'),locate('he','hello',2),locate('lo','hello',2) ; select instr('hello','he'); select position('ll' in 'hello'),position('a' in 'hello'); select left('hello',2),right('hello',2),substring('hello',2,2),mid('hello',1,5) ; select concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1)) ; select substring_index('www.tcx.se','.',-2),substring_index('www.tcx.se','.',1); select substring_index('www.tcx.se','tcx',1),substring_index('www.tcx.se','tcx',-1); select substring_index('.tcx.se','.',-2),substring_index('.tcx.se','.tcx',-1); select concat(':',ltrim(' left '),':',rtrim(' right '),':'); select concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':'); select concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':'); select concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':'); select concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':'); select TRIM("foo" FROM "foo"), TRIM("foo" FROM "foook"), TRIM("foo" FROM "okfoo"); select insert('txs',2,1,'hi'),insert('is ',4,0,'a'),insert('txxxxt',2,4,'es'); select replace('aaaa','a','b'),replace('aaaa','aa','b'),replace('aaaa','a','bb'),replace('aaaa','','b'),replace('bbbb','a','c'); select replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL') ; select soundex(''),soundex('he'),soundex('hello all folks'); select password('test'),length(encrypt('test')),encrypt('test','aa'); select md5('hello'); select repeat('monty',5),concat('*',space(5),'*'); select reverse('abc'),reverse('abcd'); select rpad('a',4,'1'),rpad('a',4,'12'),rpad('abcd',3,'12'); select lpad('a',4,'1'),lpad('a',4,'12'),lpad('abcd',3,'12'); select rpad(741653838,17,'0'),lpad(741653838,17,'0'); select rpad('abcd',7,'ab'),lpad('abcd',7,'ab'); select rpad('abcd',1,'ab'),lpad('abcd',1,'ab'); select LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD'),GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD'); select least(1,2,3) | greatest(16,32,8), least(5,4)*1,greatest(-1.0,1.0)*1,least(3,2,1)*1.0,greatest(1,1.1,1.0),least("10",9),greatest("A","B","0"); select decode(encode(repeat("a",100000),"monty"),"monty")=repeat("a",100000); select decode(encode("abcdef","monty"),"monty")="abcdef"; # # Wrong usage of functions # select reverse(""); select insert("aa",100,1,"b"),insert("aa",1,3,"b"),left("aa",-1),substring("a",1,2); select elt(2,1),field(NULL,"a","b","c"),reverse(""); select locate("a","b",2),locate("","a",1); select ltrim("a"),rtrim("a"),trim(BOTH "" from "a"),trim(BOTH " " from "a"); select concat("1","2")|0,concat("1",".5")+0.0; select substring_index("www.tcx.se","",3); select length(repeat("a",100000000)),length(repeat("a",1000*64)); select position("0" in "baaa" in (1)),position("0" in "1" in (1,2,3)),position("sql" in ("mysql")); select position(("1" in (1,2,3)) in "01"); select length(repeat("a",65500)),length(concat(repeat("a",32000),repeat("a",32000))),length(replace("aaaaa","a",concat(repeat("a",10000)))),length(insert(repeat("a",40000),1,30000,repeat("b",50000))); select length(repeat("a",1000000)),length(concat(repeat("a",32000),repeat("a",32000),repeat("a",32000))),length(replace("aaaaa","a",concat(repeat("a",32000)))),length(insert(repeat("a",48000),1,1000,repeat("a",48000))); # # Problem med concat # create table t1 ( domain char(50) ); insert into t1 VALUES ("hello.de" ), ("test.de" ); select domain from t1 where concat('@', trim(leading '.' from concat('.', domain))) = '@hello.de'; select domain from t1 where concat('@', trim(leading '.' from concat('.', domain))) = '@test.de'; drop table t1;