DROP DATABASE IF EXISTS mcs40_db;
CREATE DATABASE mcs40_db;
USE mcs40_db;
CREATE TABLE t1(t1_int INT, t1_char CHAR(5))ENGINE=Columnstore;
INSERT INTO t1 VALUES(1,'aaa'),(2,'aaa'),(3,'bbb'),(4,'ccc'),(5,'ddd');
SELECT (t1_int+1),(t1_int-1),(t1_int*2),(t1_int/10.3) FROM t1;
(t1_int+1)	(t1_int-1)	(t1_int*2)	(t1_int/10.3)
2	0	2	0.0971
3	1	4	0.1942
4	2	6	0.2913
5	3	8	0.3883
6	4	10	0.4854
SELECT * FROM t1 WHERE t1_int <= 1 OR t1_char='aaa';
t1_int	t1_char
1	aaa
2	aaa
SELECT * FROM t1 WHERE t1_int <= 1 || t1_char='aaa';
t1_int	t1_char
1	aaa
2	aaa
SELECT * FROM t1 WHERE t1_int > 1 AND t1_char LIKE '%a%';
t1_int	t1_char
2	aaa
SELECT * FROM t1 WHERE t1_int > 1 && t1_char='aaa';
t1_int	t1_char
2	aaa
SELECT * FROM t1 WHERE t1_int NOT LIKE 1;
t1_int	t1_char
2	aaa
3	bbb
4	ccc
5	ddd
SELECT * FROM t1 WHERE t1_int != 1;
t1_int	t1_char
2	aaa
3	bbb
4	ccc
5	ddd
SELECT * FROM t1 WHERE t1_int BETWEEN 1 AND 5;
t1_int	t1_char
1	aaa
2	aaa
3	bbb
4	ccc
5	ddd
SELECT * FROM t1 WHERE t1_int NOT BETWEEN 2 AND 5;
t1_int	t1_char
1	aaa
SELECT * FROM t1 WHERE t1_int NOT IN (SELECT t1_int FROM t1 WHERE t1_int=1);
t1_int	t1_char
2	aaa
3	bbb
4	ccc
5	ddd
SELECT * FROM t1 WHERE t1_char IN (SELECT t1_char FROM t1 WHERE t1_char='aaa');
t1_int	t1_char
1	aaa
2	aaa
SELECT CASE t1_int WHEN t1_int=1 THEN t1_char ELSE t1_int END FROM t1;
CASE t1_int WHEN t1_int=1 THEN t1_char ELSE t1_int END
aaa
2
3
4
5
SET @a=25;
SET @b=25;
SELECT @a+@b;
@a+@b
50
SELECT @a-@b;
@a-@b
0
SELECT @a/@b;
@a/@b
1.0000
SELECT @a*@b;
@a*@b
625
SELECT @a>@b;
@a>@b
0
SELECT @a>=@b;
@a>=@b
1
SELECT @a=@b;
@a=@b
1
SELECT @a!=@b;
@a!=@b
0
SELECT @a<@b;
@a<@b
0
SELECT @a<=@b;
@a<=@b
1
SELECT (@a*@b)/POW(@b,0.5);
(@a*@b)/POW(@b,0.5)
125
SELECT (POW(@a,2)-@a)/@b;
(POW(@a,2)-@a)/@b
24
SELECT @a==@b;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '=@b' at line 1
DROP DATABASE mcs40_db;