oceanbase

1
drop table if exists t1;
2
select 1+2 c1;
3
c1
4
3
5
select 1+2 as c1;
6
c1
7
3
8
select 1 c1;
9
c1
10
1
11
select 1 as c1;
12
c1
13
1
14
select 1+2 c1 from dual where 1=1;
15
c1
16
3
17
select 1+2 as c1 from dual where 1=1;
18
c1
19
3
20
select 1 c1 from dual where 1=1;
21
c1
22
1
23
select 1 as c1 from dual where NULL is NULL;
24
c1
25
1
26
create table t1(c1 int primary key, c2 int);
27
insert into t1 values(1,1),(2,1);
28
select c2 +100 c3 from t1 where c1=1;
29
c3
30
101
31
select c2 -100 c3 from t1 where c1 in (1,2);
32
c3
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-99
34
-99
35
drop table t1;
36
create table t1(c1 int,c2 varchar(1024),c3 float,c4 datetime(6),c5 int,c6 varchar(1024),c7 float, primary key(c1,c2));
37
insert into t1 (c1,c2,c3,c5,c6,c7) values(1,'s',1.5,1,'t',2.5);
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select c5+1 c51,c6 c61,c7+1 c71 from t1 where c1=1 and c2='s' and c3=1.5;
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c51	c61	c71
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2	t	3.5
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select c5+1 c51,c6 c61,c7+1 c71 from t1 where c1=1 and c2='s' and c3=1.5 and c5 in (1,2,3);
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c51	c61	c71
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2	t	3.5
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drop table t1;
45