drop table if exists t1,t2; select 0=0,1>0,1>=1,1<0,1<=0,1!=0,strcmp("abc","abcd"),strcmp("b","a"),strcmp("a","a") ; 0=0 1>0 1>=1 1<0 1<=0 1!=0 strcmp("abc","abcd") strcmp("b","a") strcmp("a","a") 1 1 1 0 0 1 -1 1 0 select "a"<"b","a"<="b","b">="a","b">"a","a"="A","a"<>"b"; "a"<"b" "a"<="b" "b">="a" "b">"a" "a"="A" "a"<>"b" 1 1 1 1 1 1 select "a "="A", "A "="a", "a " <= "A b"; "a "="A" "A "="a" "a " <= "A b" 1 1 1 select "abc" like "a%", "abc" not like "%d%", "a%" like "a\%","abc%" like "a%\%","abcd" like "a%b_%d", "a" like "%%a","abcde" like "a%_e","abc" like "abc%"; "abc" like "a%" "abc" not like "%d%" "a%" like "a\%" "abc%" like "a%\%" "abcd" like "a%b_%d" "a" like "%%a" "abcde" like "a%_e" "abc" like "abc%" 1 1 1 1 1 1 1 1 select "a" like "%%b","a" like "%%ab","ab" like "a\%", "ab" like "_", "ab" like "ab_", "abc" like "%_d", "abc" like "abc%d"; "a" like "%%b" "a" like "%%ab" "ab" like "a\%" "ab" like "_" "ab" like "ab_" "abc" like "%_d" "abc" like "abc%d" 0 0 0 0 0 0 0 select '?' like '|%', '?' like '|%' ESCAPE '|', '%' like '|%', '%' like '|%' ESCAPE '|', '%' like '%'; '?' like '|%' '?' like '|%' ESCAPE '|' '%' like '|%' '%' like '|%' ESCAPE '|' '%' like '%' 0 0 0 1 1 select 'abc' like '%c','abcabc' like '%c', "ab" like "", "ab" like "a", "ab" like "ab"; 'abc' like '%c' 'abcabc' like '%c' "ab" like "" "ab" like "a" "ab" like "ab" 1 1 0 0 1 select "Det här är svenska" regexp "h[[:alpha:]]+r", "aba" regexp "^(a|b)*$"; "Det här är svenska" regexp "h[[:alpha:]]+r" "aba" regexp "^(a|b)*$" 1 1 select "aba" regexp concat("^","a"); "aba" regexp concat("^","a") 1 select !0,NOT 0=1,!(0=0),1 AND 1,1 && 0,0 OR 1,1 || NULL, 1=1 or 1=1 and 1=0; !0 NOT 0=1 !(0=0) 1 AND 1 1 && 0 0 OR 1 1 || NULL 1=1 or 1=1 and 1=0 1 1 0 1 0 1 1 1 select 2 between 1 and 3, "monty" between "max" and "my",2=2 and "monty" between "max" and "my" and 3=3; 2 between 1 and 3 "monty" between "max" and "my" 2=2 and "monty" between "max" and "my" and 3=3 1 1 1 select 'b' between 'a' and 'c', 'B' between 'a' and 'c'; 'b' between 'a' and 'c' 'B' between 'a' and 'c' 1 1 select 2 in (3,2,5,9,5,1),"monty" in ("david","monty","allan"), 1.2 in (1.4,1.2,1.0); 2 in (3,2,5,9,5,1) "monty" in ("david","monty","allan") 1.2 in (1.4,1.2,1.0) 1 1 1 select -1.49 or -1.49,0.6 or 0.6; -1.49 or -1.49 0.6 or 0.6 1 1 select 3 ^ 11, 1 ^ 1, 1 ^ 0, 1 ^ NULL, NULL ^ 1; 3 ^ 11 1 ^ 1 1 ^ 0 1 ^ NULL NULL ^ 1 8 0 1 NULL NULL explain extended select 3 ^ 11, 1 ^ 1, 1 ^ 0, 1 ^ NULL, NULL ^ 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 select (3 ^ 11) AS `3 ^ 11`,(1 ^ 1) AS `1 ^ 1`,(1 ^ 0) AS `1 ^ 0`,(1 ^ NULL) AS `1 ^ NULL`,(NULL ^ 1) AS `NULL ^ 1` select 1 XOR 1, 1 XOR 0, 0 XOR 1, 0 XOR 0, NULL XOR 1, 1 XOR NULL, 0 XOR NULL; 1 XOR 1 1 XOR 0 0 XOR 1 0 XOR 0 NULL XOR 1 1 XOR NULL 0 XOR NULL 0 1 1 0 NULL NULL NULL select 1 like 2 xor 2 like 1; 1 like 2 xor 2 like 1 0 select 10 % 7, 10 mod 7, 10 div 3; 10 % 7 10 mod 7 10 div 3 3 3 3 explain extended select 10 % 7, 10 mod 7, 10 div 3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 select (10 % 7) AS `10 % 7`,(10 % 7) AS `10 mod 7`,(10 DIV 3) AS `10 div 3` select (1 << 64)-1, ((1 << 64)-1) DIV 1, ((1 << 64)-1) DIV 2; (1 << 64)-1 ((1 << 64)-1) DIV 1 ((1 << 64)-1) DIV 2 18446744073709551615 18446744073709551615 9223372036854775807 explain extended select (1 << 64)-1, ((1 << 64)-1) DIV 1, ((1 << 64)-1) DIV 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 select ((1 << 64) - 1) AS `(1 << 64)-1`,(((1 << 64) - 1) DIV 1) AS `((1 << 64)-1) DIV 1`,(((1 << 64) - 1) DIV 2) AS `((1 << 64)-1) DIV 2` create table t1 (a int); insert t1 values (1); select * from t1 where 1 xor 1; a explain extended select * from t1 where 1 xor 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where 0 select - a from t1; - a -1 explain extended select - a from t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 Warnings: Note 1003 select -('1') AS `- a` from `test`.`t1` drop table t1; select 5 between 0 and 10 between 0 and 1,(5 between 0 and 10) between 0 and 1; 5 between 0 and 10 between 0 and 1 (5 between 0 and 10) between 0 and 1 0 1 select 1 and 2 between 2 and 10, 2 between 2 and 10 and 1; 1 and 2 between 2 and 10 2 between 2 and 10 and 1 1 1 select 1 and 0 or 2, 2 or 1 and 0; 1 and 0 or 2 2 or 1 and 0 1 1 select _koi8r'a' = _koi8r'A'; _koi8r'a' = _koi8r'A' 1 select _koi8r'a' = _koi8r'A' COLLATE koi8r_general_ci; _koi8r'a' = _koi8r'A' COLLATE koi8r_general_ci 1 explain extended select _koi8r'a' = _koi8r'A' COLLATE koi8r_general_ci; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 select (_koi8r'a' = (_koi8r'A' collate koi8r_general_ci)) AS `_koi8r'a' = _koi8r'A' COLLATE koi8r_general_ci` select _koi8r'a' = _koi8r'A' COLLATE koi8r_bin; _koi8r'a' = _koi8r'A' COLLATE koi8r_bin 0 select _koi8r'a' COLLATE koi8r_general_ci = _koi8r'A'; _koi8r'a' COLLATE koi8r_general_ci = _koi8r'A' 1 select _koi8r'a' COLLATE koi8r_bin = _koi8r'A'; _koi8r'a' COLLATE koi8r_bin = _koi8r'A' 0 select _koi8r'a' COLLATE koi8r_bin = _koi8r'A' COLLATE koi8r_general_ci; ERROR HY000: Illegal mix of collations (koi8r_bin,EXPLICIT) and (koi8r_general_ci,EXPLICIT) for operation '=' select _koi8r'a' = _latin1'A'; ERROR HY000: Illegal mix of collations (koi8r_general_ci,COERCIBLE) and (latin1_swedish_ci,COERCIBLE) for operation '=' select strcmp(_koi8r'a', _koi8r'A'); strcmp(_koi8r'a', _koi8r'A') 0 select strcmp(_koi8r'a', _koi8r'A' COLLATE koi8r_general_ci); strcmp(_koi8r'a', _koi8r'A' COLLATE koi8r_general_ci) 0 select strcmp(_koi8r'a', _koi8r'A' COLLATE koi8r_bin); strcmp(_koi8r'a', _koi8r'A' COLLATE koi8r_bin) 1 select strcmp(_koi8r'a' COLLATE koi8r_general_ci, _koi8r'A'); strcmp(_koi8r'a' COLLATE koi8r_general_ci, _koi8r'A') 0 select strcmp(_koi8r'a' COLLATE koi8r_bin, _koi8r'A'); strcmp(_koi8r'a' COLLATE koi8r_bin, _koi8r'A') 1 select strcmp(_koi8r'a' COLLATE koi8r_general_ci, _koi8r'A' COLLATE koi8r_bin); ERROR HY000: Illegal mix of collations (koi8r_general_ci,EXPLICIT) and (koi8r_bin,EXPLICIT) for operation 'strcmp' select strcmp(_koi8r'a', _latin1'A'); ERROR HY000: Illegal mix of collations (koi8r_general_ci,COERCIBLE) and (latin1_swedish_ci,COERCIBLE) for operation 'strcmp' select _koi8r'a' LIKE _koi8r'A'; _koi8r'a' LIKE _koi8r'A' 1 select _koi8r'a' LIKE _koi8r'A' COLLATE koi8r_general_ci; _koi8r'a' LIKE _koi8r'A' COLLATE koi8r_general_ci 1 select _koi8r'a' LIKE _koi8r'A' COLLATE koi8r_bin; _koi8r'a' LIKE _koi8r'A' COLLATE koi8r_bin 0 select _koi8r'a' COLLATE koi8r_general_ci LIKE _koi8r'A'; _koi8r'a' COLLATE koi8r_general_ci LIKE _koi8r'A' 1 select _koi8r'a' COLLATE koi8r_bin LIKE _koi8r'A'; _koi8r'a' COLLATE koi8r_bin LIKE _koi8r'A' 0 select _koi8r'a' COLLATE koi8r_general_ci LIKE _koi8r'A' COLLATE koi8r_bin; ERROR HY000: Illegal mix of collations (koi8r_general_ci,EXPLICIT) and (koi8r_bin,EXPLICIT) for operation 'like' select _koi8r'a' LIKE _latin1'A'; ERROR HY000: Illegal mix of collations (koi8r_general_ci,COERCIBLE) and (latin1_swedish_ci,COERCIBLE) for operation 'like' CREATE TABLE t1 ( faq_group_id int(11) NOT NULL default '0', faq_id int(11) NOT NULL default '0', title varchar(240) default NULL, keywords text, description longblob, solution longblob, status tinyint(4) NOT NULL default '0', access_id smallint(6) default NULL, lang_id smallint(6) NOT NULL default '0', created datetime NOT NULL default '0000-00-00 00:00:00', updated datetime default NULL, last_access datetime default NULL, last_notify datetime default NULL, solved_count int(11) NOT NULL default '0', static_solved int(11) default NULL, solved_1 int(11) default NULL, solved_2 int(11) default NULL, solved_3 int(11) default NULL, solved_4 int(11) default NULL, solved_5 int(11) default NULL, expires datetime default NULL, notes text, assigned_to smallint(6) default NULL, assigned_group smallint(6) default NULL, last_edited_by smallint(6) default NULL, orig_ref_no varchar(15) binary default NULL, c$fundstate smallint(6) default NULL, c$contributor smallint(6) default NULL, UNIQUE KEY t1$faq_id (faq_id), KEY t1$group_id$faq_id (faq_group_id,faq_id), KEY t1$c$fundstate (c$fundstate) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (82,82,'How to use the DynaVox Usage Counts Feature','usages count, number, corner, white, box, button','\r\n\r\n \r\n \r\n \r\n \r\n
 \r\n

How \r\n To: \r\n Display or Hide the Usage Counts to find out how many times each button is being selected.

\r\n
','\r\n \r\n \r\n \r\n \r\n\r\n \r\n
  \r\n \r\n

1. Select \r\n the On/Setup button to access the DynaVox Setup Menu.
\r\n 2. Select Button Features.
\r\n 3. Below the OK button is the Usage Counts button.
\r\n a. If it says \"Hidden\" then the Usage Counts will not be displayed.
\r\n b. If it says \"Displayed\" then the Usage Counts will be shown.
\r\n c. Select the Usage Counts Option Ring once and it will toggle \r\n to the alternative option.
\r\n 4. Once the correct setting has been chosen, select OK to leave the Button \r\n Features menu.
\r\n 5. Select OK out of the Setup menu and return to the communication \r\n page.

\r\n

For \r\n further information on Usage Counts, see the Button Features \r\n Menu Entry in the DynaVox/DynaMyte Reference Manual.

\r\n
',4,1,1,'2001-11-16 16:43:34','2002-11-25 12:09:43','2003-07-24 01:04:48',NULL,11,NULL,0,0,0,0,0,NULL,NULL,NULL,NULL,11,NULL,NULL,NULL); CREATE TABLE t2 ( access_id smallint(6) NOT NULL default '0', name varchar(20) binary default NULL, rank smallint(6) NOT NULL default '0', KEY t2$access_id (access_id) ) ENGINE=MyISAM; INSERT INTO t2 VALUES (1,'Everyone',2),(2,'Help',3),(3,'Customer Support',1); SELECT f_acc.rank, a1.rank, a2.rank FROM t1 LEFT JOIN t1 f1 ON (f1.access_id=1 AND f1.faq_group_id = t1.faq_group_id) LEFT JOIN t2 a1 ON (a1.access_id = f1.access_id) LEFT JOIN t1 f2 ON (f2.access_id=3 AND f2.faq_group_id = t1.faq_group_id) LEFT JOIN t2 a2 ON (a2.access_id = f2.access_id), t2 f_acc WHERE LEAST(a1.rank,a2.rank) = f_acc.rank; rank rank rank DROP TABLE t1,t2; CREATE TABLE t1 (d varchar(6), k int); INSERT INTO t1 VALUES (NULL, 2); SELECT GREATEST(d,d) FROM t1 WHERE k=2; GREATEST(d,d) NULL DROP TABLE t1; select 1197.90 mod 50; 1197.90 mod 50 47.90 select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3; 5.1 mod 3 5.1 mod -3 -5.1 mod 3 -5.1 mod -3 2.1 2.1 -2.1 -2.1 select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3; 5 mod 3 5 mod -3 -5 mod 3 -5 mod -3 2 2 -2 -2 select (12%0) <=> null as '1'; 1 1 select (12%0) is null as '1'; 1 1 select 12%0 as 'NULL'; NULL NULL select 12%2 as '0'; 0 0 select 12%NULL as 'NULL'; NULL NULL select 12 % null as 'NULL'; NULL NULL select null % 12 as 'NULL'; NULL NULL select null % 0 as 'NULL'; NULL NULL select 0 % null as 'NULL'; NULL NULL select null % null as 'NULL'; NULL NULL select (12 mod 0) <=> null as '1'; 1 1 select (12 mod 0) is null as '1'; 1 1 select 12 mod 0 as 'NULL'; NULL NULL select 12 mod 2 as '0'; 0 0 select 12 mod null as 'NULL'; NULL NULL select null mod 12 as 'NULL'; NULL NULL select null mod 0 as 'NULL'; NULL NULL select 0 mod null as 'NULL'; NULL NULL select null mod null as 'NULL'; NULL NULL select mod(12.0, 0) as 'NULL'; NULL NULL select mod(12, 0.0) as 'NULL'; NULL NULL select mod(12, NULL) as 'NULL'; NULL NULL select mod(12.0, NULL) as 'NULL'; NULL NULL select mod(NULL, 2) as 'NULL'; NULL NULL select mod(NULL, 2.0) as 'NULL'; NULL NULL create table t1 (a int, b int); insert into t1 values (1,2), (2,3), (3,4), (4,5); select * from t1 where a not between 1 and 2; a b 3 4 4 5 select * from t1 where a not between 1 and 2 and b not between 3 and 4; a b 4 5 drop table t1; SELECT GREATEST(1,NULL) FROM DUAL; GREATEST(1,NULL) NULL SELECT LEAST('xxx','aaa',NULL,'yyy') FROM DUAL; LEAST('xxx','aaa',NULL,'yyy') NULL SELECT LEAST(1.1,1.2,NULL,1.0) FROM DUAL; LEAST(1.1,1.2,NULL,1.0) NULL SELECT GREATEST(1.5E+2,1.3E+2,NULL) FROM DUAL; GREATEST(1.5E+2,1.3E+2,NULL) NULL