7
7
# Testing of NULL in a lot of different places
11
10
select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
13
11
explain extended select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
14
12
select CONCAT(1, NULL),1+NULL,1-NULL;
15
13
select NULL=NULL,NULL<>NULL,IFNULL(NULL,1.1)+0,CONCAT(IFNULL(NULL,1), 0);