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create table t (
a int,
b int without system versioning
) with system versioning;
insert into t values(1, 2);
insert into t values(3, 4);
select * from t;
a b
1 2
3 4
select a from t for system_time as of timestamp now(6);
a
1
3
select a, b, b+0 from t for system_time as of timestamp now(6);
a b b+0
1 2 2
3 4 4
select * from t for system_time as of timestamp now(6);
a b
1 2
3 4
select count(*) from t for system_time as of timestamp now(6) group by b;
count(*)
1
1
select * from t for system_time as of timestamp now(6) order by b asc;
a b
1 2
3 4
select * from t for system_time as of timestamp now(6) order by b desc;
a b
3 4
1 2
select * from t for system_time as of timestamp now(6) group by a having a=2;
a b
select * from t for system_time as of timestamp now(6) group by b having b=2;
a b
1 2
select a from t for system_time as of timestamp now(6) where b=2;
a
1
select a from t for system_time as of timestamp now(6) where b=NULL;
a
select a from t for system_time as of timestamp now(6) where b is NULL;
a
select count(*), b from t for system_time as of timestamp now(6) group by b having b=NULL;
count(*) b
select a, b from t;
a b
1 2
3 4
create or replace table t (
a int,
b int not null without system versioning
) with system versioning;
insert into t values (1, 2), (3, 4);
select * from t for system_time as of timestamp now(6);
a b
1 2
3 4
select * from t for system_time as of timestamp now(6) where b is NULL;
a b
create or replace table t (x int with system versioning, y int);
select column_name, extra from information_schema.columns where table_name='t';
column_name extra
x
y WITHOUT SYSTEM VERSIONING
show create table t;
Table Create Table
t CREATE TABLE `t` (
`x` int(11) DEFAULT NULL,
`y` int(11) DEFAULT NULL WITHOUT SYSTEM VERSIONING
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci WITH SYSTEM VERSIONING
drop table t;
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