How to update records whose value is not in the ranges stored in another table
I need to update all records in a table for which it's value is not part of any range stored in another table. The query that updates records where it's value is part of a range is no problem:
update table_a
join table_range on
(table_a.x >= table_range.fromValue
and table_a.x <= table_range.toValue开发者_如何学C)
set table_a.someColumn = 'is in range'
But I can't figure out how to update the records of the following query result:
select *
from table_a
where x NOT IN (
select x
from table_a inner join table_range on
(x >= fromValue AND x <= toValue)
)
Thanks in advance
How about the following?
drop table table_a;
drop table table_ranges;
create table table_a(
x int not null
,flag varchar(20)
);
create table table_ranges(
fromvalue int not null
,tovalue int not null
);
insert into table_a(x) values(10);
insert into table_a(x) values(20);
insert into table_a(x) values(30);
insert into table_ranges values(0,9);
insert into table_ranges values(10,19);
insert into table_ranges values(20,29);
update table_a a
set flag = 'not in range'
where not exists(
select *
from table_ranges r
where a.x between r.fromvalue and r.tovalue
);
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