drop table if exists t1; select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo'; hello 'hello' ""hello"" 'h'e'l'l'o' hel"lo hel'lo hello 'hello' ""hello"" 'h'e'l'l'o' hel"lo hel'lo select 'hello' 'monty'; hello hellomonty select length('\n\t\r\b\0\_\%\\'); length('\n\t\r\b\0\_\%\\') 10 select bit_length('\n\t\r\b\0\_\%\\'); bit_length('\n\t\r\b\0\_\%\\') 80 select concat('monty',' was here ','again'),length('hello'),char(ascii('h')); concat('monty',' was here ','again') length('hello') char(ascii('h')) monty was here again 5 h select locate('he','hello'),locate('he','hello',2),locate('lo','hello',2) ; locate('he','hello') locate('he','hello',2) locate('lo','hello',2) 1 0 4 select instr('hello','HE'), instr('hello',binary 'HE'), instr(binary 'hello','HE'); instr('hello','HE') instr('hello',binary 'HE') instr(binary 'hello','HE') 1 0 0 select position(binary 'll' in 'hello'),position('a' in binary 'hello'); position(binary 'll' in 'hello') position('a' in binary 'hello') 3 0 select left('hello',2),right('hello',2),substring('hello',2,2),mid('hello',1,5) ; left('hello',2) right('hello',2) substring('hello',2,2) mid('hello',1,5) he lo el hello select concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1)) ; concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1)) happy select substring_index('www.tcx.se','.',-2),substring_index('www.tcx.se','.',1); substring_index('www.tcx.se','.',-2) substring_index('www.tcx.se','.',1) tcx.se www select substring_index('www.tcx.se','tcx',1),substring_index('www.tcx.se','tcx',-1); substring_index('www.tcx.se','tcx',1) substring_index('www.tcx.se','tcx',-1) www. .se select substring_index('.tcx.se','.',-2),substring_index('.tcx.se','.tcx',-1); substring_index('.tcx.se','.',-2) substring_index('.tcx.se','.tcx',-1) tcx.se .se select concat(':',ltrim(' left '),':',rtrim(' right '),':'); concat(':',ltrim(' left '),':',rtrim(' right '),':') :left : right: select concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':'); concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':') :left: right: select concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':'); concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':') :m:y:s: select concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':'); concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':') :my:sql: select concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':'); concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':') :my:sql: select TRIM("foo" FROM "foo"), TRIM("foo" FROM "foook"), TRIM("foo" FROM "okfoo"); TRIM("foo" FROM "foo") TRIM("foo" FROM "foook") TRIM("foo" FROM "okfoo") ok ok select concat_ws(', ','monty','was here','again'); concat_ws(', ','monty','was here','again') monty, was here, again select concat_ws(NULL,'a'),concat_ws(',',NULL,''); concat_ws(NULL,'a') concat_ws(',',NULL,'') NULL select concat_ws(',','',NULL,'a'); concat_ws(',','',NULL,'a') ,a SELECT CONCAT('"',CONCAT_WS('";"',repeat('a',60),repeat('b',60),repeat('c',60),repeat('d',100)), '"'); CONCAT('"',CONCAT_WS('";"',repeat('a',60),repeat('b',60),repeat('c',60),repeat('d',100)), '"') "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";"cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc";"dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd" select insert('txs',2,1,'hi'),insert('is ',4,0,'a'),insert('txxxxt',2,4,'es'); insert('txs',2,1,'hi') insert('is ',4,0,'a') insert('txxxxt',2,4,'es') this is a test select replace('aaaa','a','b'),replace('aaaa','aa','b'),replace('aaaa','a','bb'),replace('aaaa','','b'),replace('bbbb','a','c'); replace('aaaa','a','b') replace('aaaa','aa','b') replace('aaaa','a','bb') replace('aaaa','','b') replace('bbbb','a','c') bbbb bb bbbbbbbb aaaa bbbb select replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL') ; replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL') this is a REAL test select soundex(''),soundex('he'),soundex('hello all folks'),soundex('#3556 in bugdb'); soundex('') soundex('he') soundex('hello all folks') soundex('#3556 in bugdb') H000 H4142 I51231 select md5('hello'); md5('hello') 5d41402abc4b2a76b9719d911017c592 select sha('abc'); sha('abc') a9993e364706816aba3e25717850c26c9cd0d89d select sha1('abc'); sha1('abc') a9993e364706816aba3e25717850c26c9cd0d89d select aes_decrypt(aes_encrypt('abc','1'),'1'); aes_decrypt(aes_encrypt('abc','1'),'1') abc select aes_decrypt(aes_encrypt('abc','1'),1); aes_decrypt(aes_encrypt('abc','1'),1) abc select aes_encrypt(NULL,"a"); aes_encrypt(NULL,"a") NULL select aes_encrypt("a",NULL); aes_encrypt("a",NULL) NULL select aes_decrypt(NULL,"a"); aes_decrypt(NULL,"a") NULL select aes_decrypt("a",NULL); aes_decrypt("a",NULL) NULL select aes_decrypt("a","a"); aes_decrypt("a","a") NULL select aes_decrypt(aes_encrypt("","a"),"a"); aes_decrypt(aes_encrypt("","a"),"a") select repeat('monty',5),concat('*',space(5),'*'); repeat('monty',5) concat('*',space(5),'*') montymontymontymontymonty * * select reverse('abc'),reverse('abcd'); reverse('abc') reverse('abcd') cba dcba select rpad('a',4,'1'),rpad('a',4,'12'),rpad('abcd',3,'12'), rpad(11, 10 , 22), rpad("ab", 10, 22); rpad('a',4,'1') rpad('a',4,'12') rpad('abcd',3,'12') rpad(11, 10 , 22) rpad("ab", 10, 22) a111 a121 abc 1122222222 ab22222222 select lpad('a',4,'1'),lpad('a',4,'12'),lpad('abcd',3,'12'), lpad(11, 10 , 22); lpad('a',4,'1') lpad('a',4,'12') lpad('abcd',3,'12') lpad(11, 10 , 22) 111a 121a abc 2222222211 select rpad(741653838,17,'0'),lpad(741653838,17,'0'); rpad(741653838,17,'0') lpad(741653838,17,'0') 74165383800000000 00000000741653838 select rpad('abcd',7,'ab'),lpad('abcd',7,'ab'); rpad('abcd',7,'ab') lpad('abcd',7,'ab') abcdaba abaabcd select rpad('abcd',1,'ab'),lpad('abcd',1,'ab'); rpad('abcd',1,'ab') lpad('abcd',1,'ab') a a select rpad('STRING', 20, CONCAT('p','a','d') ); rpad('STRING', 20, CONCAT('p','a','d') ) STRINGpadpadpadpadpa select lpad('STRING', 20, CONCAT('p','a','d') ); lpad('STRING', 20, CONCAT('p','a','d') ) padpadpadpadpaSTRING select LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD'),GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD'); LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD') GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD') HAROLD HARRY 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"); 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") 33 4 1.0 1.0 1.1 9 B select decode(encode(repeat("a",100000),"monty"),"monty")=repeat("a",100000); decode(encode(repeat("a",100000),"monty"),"monty")=repeat("a",100000) 1 select decode(encode("abcdef","monty"),"monty")="abcdef"; decode(encode("abcdef","monty"),"monty")="abcdef" 1 select quote('\'\"\\test'); quote('\'\"\\test') '\'"\\test' select quote(concat('abc\'', '\\cba')); quote(concat('abc\'', '\\cba')) 'abc\'\\cba' select quote(1/0), quote('\0\Z'); quote(1/0) quote('\0\Z') NULL '\0\Z' select length(quote(concat(char(0),"test"))); length(quote(concat(char(0),"test"))) 8 select hex(quote(concat(char(224),char(227),char(230),char(231),char(232),char(234),char(235)))); hex(quote(concat(char(224),char(227),char(230),char(231),char(232),char(234),char(235)))) 27E0E3E6E7E8EAEB27 select reverse(""); reverse("") select insert("aa",100,1,"b"),insert("aa",1,3,"b"),left("aa",-1),substring("a",1,2); insert("aa",100,1,"b") insert("aa",1,3,"b") left("aa",-1) substring("a",1,2) aa b a select elt(2,1),field(NULL,"a","b","c"),reverse(""); elt(2,1) field(NULL,"a","b","c") reverse("") NULL 0 select locate("a","b",2),locate("","a",1); locate("a","b",2) locate("","a",1) 0 1 select ltrim("a"),rtrim("a"),trim(BOTH "" from "a"),trim(BOTH " " from "a"); ltrim("a") rtrim("a") trim(BOTH "" from "a") trim(BOTH " " from "a") a a a a select concat("1","2")|0,concat("1",".5")+0.0; concat("1","2")|0 concat("1",".5")+0.0 12 1.5 select substring_index("www.tcx.se","",3); substring_index("www.tcx.se","",3) select length(repeat("a",100000000)),length(repeat("a",1000*64)); length(repeat("a",100000000)) length(repeat("a",1000*64)) NULL 64000 select position("0" in "baaa" in (1)),position("0" in "1" in (1,2,3)),position("sql" in ("mysql")); position("0" in "baaa" in (1)) position("0" in "1" in (1,2,3)) position("sql" in ("mysql")) 1 0 3 select position(("1" in (1,2,3)) in "01"); position(("1" in (1,2,3)) in "01") 2 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))); 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))) 65500 64000 50000 60000 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))); 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))) 1000000 96000 160000 95000 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'; domain hello.de select domain from t1 where concat('@', trim(leading '.' from concat('.', domain))) = '@test.de'; domain test.de drop table t1; CREATE TABLE t1 ( id int(10) unsigned NOT NULL, title varchar(255) default NULL, prio int(10) unsigned default NULL, category int(10) unsigned default NULL, program int(10) unsigned default NULL, bugdesc text, created datetime default NULL, modified timestamp(14) NOT NULL, bugstatus int(10) unsigned default NULL, submitter int(10) unsigned default NULL ) TYPE=MyISAM; INSERT INTO t1 VALUES (1,'Link',1,1,1,'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa','2001-02-28 08:40:16',20010228084016,0,4); SELECT CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified,bugstatus,submitter), '"') FROM t1; CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified,bugstatus,submitter), '"') "Link";"1";"1";"1";"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"2001-02-28 08:40:16";"20010228084016";"0";"4" SELECT CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugstatus,submitter), '"') FROM t1; CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugstatus,submitter), '"') "Link";"1";"1";"1";"0";"4" SELECT CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified,bugstatus,submitter) FROM t1; CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified,bugstatus,submitter) Link";"1";"1";"1";"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"2001-02-28 08:40:16";"20010228084016";"0";"4 SELECT bugdesc, REPLACE(bugdesc, 'xxxxxxxxxxxxxxxxxxxx', 'bbbbbbbbbbbbbbbbbbbb') from t1 group by bugdesc; bugdesc REPLACE(bugdesc, 'xxxxxxxxxxxxxxxxxxxx', 'bbbbbbbbbbbbbbbbbbbb') aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa drop table t1; CREATE TABLE t1 (id int(11) NOT NULL auto_increment, tmp text NOT NULL, KEY id (id)) TYPE=MyISAM; INSERT INTO t1 VALUES (1, 'a545f661efdd1fb66fdee3aab79945bf'); SELECT 1 FROM t1 WHERE tmp=AES_DECRYPT(tmp,"password"); 1 DROP TABLE t1; CREATE TABLE t1 ( wid int(10) unsigned NOT NULL auto_increment, data_podp date default NULL, status_wnio enum('nowy','podp','real','arch') NOT NULL default 'nowy', PRIMARY KEY(wid) ); INSERT INTO t1 VALUES (8,NULL,'real'); INSERT INTO t1 VALUES (9,NULL,'nowy'); SELECT elt(status_wnio,data_podp) FROM t1 GROUP BY wid; elt(status_wnio,data_podp) NULL NULL DROP TABLE t1; CREATE TABLE t1 ( title text ) TYPE=MyISAM; INSERT INTO t1 VALUES ('Congress reconvenes in September to debate welfare and adult education'); INSERT INTO t1 VALUES ('House passes the CAREERS bill'); SELECT CONCAT("</a>",RPAD("",(55 - LENGTH(title)),".")) from t1; CONCAT("</a>",RPAD("",(55 - LENGTH(title)),".")) NULL </a>.......................... DROP TABLE t1; CREATE TABLE t1 (i int, j int); INSERT INTO t1 VALUES (1,1),(2,2); SELECT DISTINCT i, ELT(j, '345', '34') FROM t1; i ELT(j, '345', '34') 1 345 2 34 DROP TABLE t1; create table t1(a char(4)); insert into t1 values ('one'),(NULL),('two'),('four'); select a, quote(a), isnull(quote(a)), quote(a) is null, ifnull(quote(a), 'n') from t1; a quote(a) isnull(quote(a)) quote(a) is null ifnull(quote(a), 'n') one 'one' 0 0 'one' NULL NULL 1 1 n two 'two' 0 0 'two' four 'four' 0 0 'four' drop table t1;