mirror of
https://github.com/MariaDB/server.git
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3e6c350f64
Added logging of warnings for failed connections with ssl. Fixed bug in symbolic link handling on Windows
247 lines
7.5 KiB
Text
247 lines
7.5 KiB
Text
drop table if exists t1,t2;
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create table t1 (grp int, a bigint unsigned, c char(10) not null);
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insert into t1 values (1,1,"a");
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insert into t1 values (2,2,"b");
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insert into t1 values (2,3,"c");
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insert into t1 values (3,4,"E");
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insert into t1 values (3,5,"C");
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insert into t1 values (3,6,"D");
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select a,c,sum(a) from t1 group by a;
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a c sum(a)
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1 a 1
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2 b 2
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3 c 3
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4 E 4
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5 C 5
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6 D 6
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select a,c,sum(a) from t1 where a > 10 group by a;
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a c sum(a)
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select sum(a) from t1 where a > 10;
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sum(a)
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NULL
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select a from t1 order by rand(10);
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a
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2
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6
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1
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3
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5
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4
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select distinct a from t1 order by rand(10);
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a
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2
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6
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1
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3
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5
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4
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select count(distinct a),count(distinct grp) from t1;
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count(distinct a) count(distinct grp)
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6 3
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insert into t1 values (null,null,'');
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select count(distinct a),count(distinct grp) from t1;
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count(distinct a) count(distinct grp)
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6 3
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select sum(all a),count(all a),avg(all a),std(all a),bit_or(all a),bit_and(all a),min(all a),max(all a),min(all c),max(all c) from t1;
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sum(all a) count(all a) avg(all a) std(all a) bit_or(all a) bit_and(all a) min(all a) max(all a) min(all c) max(all c)
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21 6 3.5000 1.7078 7 0 1 6 E
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select grp, sum(a),count(a),avg(a),std(a),bit_or(a),bit_and(a),min(a),max(a),min(c),max(c) from t1 group by grp;
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grp sum(a) count(a) avg(a) std(a) bit_or(a) bit_and(a) min(a) max(a) min(c) max(c)
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NULL NULL 0 NULL NULL 0 0 NULL NULL
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1 1 1 1.0000 0.0000 1 1 1 1 a a
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2 5 2 2.5000 0.5000 3 2 2 3 b c
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3 15 3 5.0000 0.8165 7 4 4 6 C E
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select grp, sum(a)+count(a)+avg(a)+std(a)+bit_or(a)+bit_and(a)+min(a)+max(a)+min(c)+max(c) as sum from t1 group by grp;
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grp sum
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NULL NULL
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1 7
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2 20
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3 44.816496580928
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create table t2 (grp int, a bigint unsigned, c char(10));
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insert into t2 select grp,max(a)+max(grp),max(c) from t1 group by grp;
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replace into t2 select grp, a, c from t1 limit 2,1;
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select * from t2;
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grp a c
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NULL NULL
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1 2 a
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2 5 c
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3 9 E
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2 3 c
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drop table t1,t2;
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CREATE TABLE t1 (id int(11),value1 float(10,2));
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INSERT INTO t1 VALUES (1,0.00),(1,1.00), (1,2.00), (2,10.00), (2,11.00), (2,12.00);
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CREATE TABLE t2 (id int(11),name char(20));
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INSERT INTO t2 VALUES (1,'Set One'),(2,'Set Two');
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select id, avg(value1), std(value1) from t1 group by id;
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id avg(value1) std(value1)
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1 1.000000 0.816497
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2 11.000000 0.816497
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select name, avg(value1), std(value1) from t1, t2 where t1.id = t2.id group by t1.id;
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name avg(value1) std(value1)
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Set One 1.000000 0.816497
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Set Two 11.000000 0.816497
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drop table t1,t2;
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create table t1 (id int not null);
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create table t2 (id int not null,rating int null);
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insert into t1 values(1),(2),(3);
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insert into t2 values(1, 3),(2, NULL),(2, NULL),(3, 2),(3, NULL);
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select t1.id, avg(rating) from t1 left join t2 on ( t1.id = t2.id ) group by t1.id;
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id avg(rating)
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1 3.0000
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2 NULL
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3 2.0000
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drop table t1,t2;
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create table t1 (a smallint(6) primary key, c char(10), b text);
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INSERT INTO t1 VALUES (1,'1','1');
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INSERT INTO t1 VALUES (2,'2','2');
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INSERT INTO t1 VALUES (4,'4','4');
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select count(*) from t1;
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count(*)
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3
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select count(*) from t1 where a = 1;
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count(*)
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1
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select count(*) from t1 where a = 100;
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count(*)
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0
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select count(*) from t1 where a >= 10;
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count(*)
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0
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select count(a) from t1 where a = 1;
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count(a)
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1
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select count(a) from t1 where a = 100;
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count(a)
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0
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select count(a) from t1 where a >= 10;
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count(a)
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0
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select count(b) from t1 where b >= 2;
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count(b)
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2
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select count(b) from t1 where b >= 10;
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count(b)
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0
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select count(c) from t1 where c = 10;
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count(c)
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0
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drop table t1;
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CREATE TABLE t1 (d DATETIME, i INT);
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INSERT INTO t1 VALUES (NOW(), 1);
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SELECT COUNT(i), i, COUNT(i)*i FROM t1 GROUP BY i;
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COUNT(i) i COUNT(i)*i
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1 1 1
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SELECT COUNT(i), (i+0), COUNT(i)*(i+0) FROM t1 GROUP BY i;
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COUNT(i) (i+0) COUNT(i)*(i+0)
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1 1 1
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DROP TABLE t1;
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create table t1 (
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num float(5,2),
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user char(20)
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);
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insert into t1 values (10.3,'nem'),(20.53,'monty'),(30.23,'sinisa');
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insert into t1 values (30.13,'nem'),(20.98,'monty'),(10.45,'sinisa');
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insert into t1 values (5.2,'nem'),(8.64,'monty'),(11.12,'sinisa');
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select sum(num) from t1;
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sum(num)
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147.58
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select sum(num) from t1 group by user;
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sum(num)
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50.15
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45.63
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51.80
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drop table t1;
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create table t1 (a1 int, a2 char(3), key k1(a1), key k2(a2));
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insert into t1 values(10,'aaa'), (10,null), (10,'bbb'), (20,'zzz');
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create table t2(a1 char(3), a2 int, a3 real, key k1(a1), key k2(a2, a1));
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select * from t1;
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a1 a2
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10 aaa
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10 NULL
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10 bbb
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20 zzz
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select min(a2) from t1;
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min(a2)
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aaa
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select max(t1.a1), max(t2.a2) from t1, t2;
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max(t1.a1) max(t2.a2)
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NULL NULL
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select max(t1.a1) from t1, t2;
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max(t1.a1)
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NULL
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select max(t2.a2), max(t1.a1) from t1, t2;
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max(t2.a2) max(t1.a1)
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NULL NULL
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explain select min(a2) from t1;
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Comment
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Select tables optimized away
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explain select max(t1.a1), max(t2.a2) from t1, t2;
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Comment
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No matching min/max row
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insert into t2 values('AAA', 10, 0.5);
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select max(t1.a1), max(t2.a1) from t1, t2 where t2.a2=9;
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max(t1.a1) max(t2.a1)
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NULL NULL
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select max(t2.a1), max(t1.a1) from t1, t2 where t2.a2=9;
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max(t2.a1) max(t1.a1)
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NULL NULL
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select t1.a1, t1.a2, t2.a1, t2.a2 from t1 left outer join t2 on t1.a1=10;
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a1 a2 a1 a2
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10 aaa AAA 10
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10 NULL AAA 10
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10 bbb AAA 10
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20 zzz NULL NULL
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10;
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max(t1.a2)
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zzz
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=20;
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max(t1.a2)
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zzz
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=10;
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max(t1.a2)
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bbb
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select max(t2.a1) from t1 left outer join t2 on t1.a2=t2.a1 and 1=0 where t2.a1='AAA';
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max(t2.a1)
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NULL
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drop table t1,t2;
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CREATE TABLE t1 (a int, b int);
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select count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1;
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count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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0 NULL NULL NULL NULL NULL -1 0
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select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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insert into t1 values (1,null);
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select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL -1 0
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insert into t1 values (1,null);
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insert into t1 values (2,null);
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select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL 0 0
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2 0 NULL NULL NULL NULL NULL 0 0
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select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL -1 0
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2 0 NULL NULL NULL NULL NULL -1 0
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insert into t1 values (2,1);
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select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL 0 0
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2 1 1 1.0000 0.0000 1 1 0 1
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select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL -1 0
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2 1 1 1.0000 0.0000 1 1 1 1
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insert into t1 values (3,1);
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select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL 0 0
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2 1 1 1.0000 0.0000 1 1 0 1
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3 1 1 1.0000 0.0000 1 1 1 1
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select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
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a count(b) sum(b) avg(b) std(b) min(b) max(b) bit_and(b) bit_or(b)
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1 0 NULL NULL NULL NULL NULL -1 0
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2 1 1 1.0000 0.0000 1 1 1 1
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3 1 1 1.0000 0.0000 1 1 1 1
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drop table t1;
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