trevor1940
asked on
PostGreSQL: Concatinate Date Time into TimeStamp
Hi
I have a table in PostgreSQL it has (Amongst others) a Date , Time and TimeStamp without time zone columns
What is the syntax for updating the timestamp column from the Date and Time columns?
I have a table in PostgreSQL it has (Amongst others) a Date , Time and TimeStamp without time zone columns
What is the syntax for updating the timestamp column from the Date and Time columns?
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Doing that way will probably involve going to text then back again which may be less efficient than using the + operation, try something like this it may be more efficient...
postgres=# create table test2 ( id int, col1 date, col2 time, col3 timestamp );
CREATE TABLE
postgres=# insert into test2(id,col1,col2) values (1, current_date, current_time);
INSERT 0 1
postgres=# select * from test2;
id | col1 | col2 | col3
----+------------+--------
1 | 2016-07-23 | 07:43:30.703 |
(1 row)
postgres=# select cast( col1+col2 as timestamp ) from test2;
timestamp
-------------------------
2016-07-23 07:43:30.703
(1 row)
postgres=# select col1+col2 from test2;
?column?
-------------------------
2016-07-23 07:43:30.703
(1 row)
postgres=# create table test2 ( id int, col1 date, col2 time, col3 timestamp );
CREATE TABLE
postgres=# insert into test2(id,col1,col2) values (1, current_date, current_time);
INSERT 0 1
postgres=# select * from test2;
id | col1 | col2 | col3
----+------------+--------
1 | 2016-07-23 | 07:43:30.703 |
(1 row)
postgres=# select cast( col1+col2 as timestamp ) from test2;
timestamp
-------------------------
2016-07-23 07:43:30.703
(1 row)
postgres=# select col1+col2 from test2;
?column?
-------------------------
2016-07-23 07:43:30.703
(1 row)
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