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DROP DATABASE IF EXISTS mcs176_db;
CREATE DATABASE mcs176_db;
USE mcs176_db;
SET default_storage_engine=Columnstore;
CREATE TABLE t1 (a CHAR(1), b INT, c DATETIME, d DOUBLE);
INSERT INTO t1 VALUES ('', NULL, '0-0-0', NULL),('a', 12, '1212-12-12', 1.19691E+100),('b', 13, '1313-3-13 13:13:13', 2.1961E+18),('c', 14, '1414-4-14', 0.16191),('d', 15, '2015-5-15 15:15:15', 1.971917);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` char(1) DEFAULT NULL,
`b` int(11) DEFAULT NULL,
`c` datetime DEFAULT NULL,
`d` double DEFAULT NULL
) ENGINE=Columnstore DEFAULT CHARSET=latin1
SELECT IF(10<20, 1, 2);
IF(10<20, 1, 2)
1
SELECT IF(STRCMP("hello","hi") = 0, "YES", "NO");
IF(STRCMP("hello","hi") = 0, "YES", "NO")
NO
SELECT a, IF(a='b', 10, 20) AS result FROM t1;
a result
NULL 20
a 20
b 10
c 20
d 20
SELECT b, IF(b<=13, 'Less than or equal to 13', 'Greater than 13') AS result FROM t1;
b result
NULL Greater than 13
12 Less than or equal to 13
13 Less than or equal to 13
14 Greater than 13
15 Greater than 13
SELECT c, IF(c>0, 'date', 'zero date') AS result FROM t1;
c result
0000-00-00 00:00:00 zero date
1212-12-12 00:00:00 date
1313-03-13 13:13:13 date
1414-04-14 00:00:00 date
2015-05-15 15:15:15 date
DROP DATABASE mcs176_db;