example sql:
select a.a1,b.b1,c.c1,d.d1,e.e1
from a
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t
I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
can... (0 Replies)
Hey!
I hope to find someone who can help me with a join question. I just can't figure it out.
I have (among others) three tables in the database "CastControl".
They are named "cc_users", "cc_plan" and "cc_servers".
In cc_users, (among others) is a row named "username" and another named... (1 Reply)
:wall:I'm having a bit of a problem with Solaris 10u8 and one of our applications requesting memory and being told, "no space left".
The break down:
24GB Physical Memory
8GB swap
at the time of occurance, here's what a memory breakdown looks like:
Page Summary Pages ... (21 Replies)
So I have 2 files:
File 1:
111,Mike,Stipe
222,Peter,Buck
333,Mike,Mills
File 2:
222,Mr,Bono
444,Mr,Edge
I want output to be below, where 222 records joined and all none joined records still in output
111,Mike,Stipe
222,Peter,Buck,Mr,Bono
333,Mike,Mills
444,Mr,Edge (4 Replies)
Hello;
I want merge four MySQL tables to get the intersection that have a common field for all of them. Join two tables is fine to me, but my this case is different from common situations and there are not very many discussions about it. Can anybody give me some idea? Thanks a lot!
Here is part... (8 Replies)
Hi guys,
I need to use awk to join 2 files
file_1
A 001
B 002
C 003
file_2
A XX1
B XX2
output desired
A 001 XX1
B 002 missing
C 003 XX2
thank you! (2 Replies)
Hi guys,
I need AWK to merge the following 2 files:
file1
1 a 1 1
2 b 2 2
3 c 3 3
4 d 4 4
file2
a a/a c/c a/c c/c a/a c/t
c c/t c/c a/t g/g c/c c/t
desired output:
1 a 1 1 a/a c/c a/c c/c a/a c/t
2 b 2 2 x x x x x x
3 c 3 3 c/t c/c a/t g/g c/c c/t
4 d 4 4 x x x x x x (2 Replies)
Hello,
This post is already here but want to do this with another way
Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv:
1|123|jojo
1|NULL|bibi... (2 Replies)
Discussion started by: yjacknewton
2 Replies
LEARN ABOUT CENTOS
select_into
SELECT INTO(7) PostgreSQL 9.2.7 Documentation SELECT INTO(7)NAME
SELECT_INTO - define a new table from the results of a query
SYNOPSIS
[ WITH [ RECURSIVE ] with_query [, ...] ]
SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ]
* | expression [ [ AS ] output_name ] [, ...]
INTO [ TEMPORARY | TEMP | UNLOGGED ] [ TABLE ] new_table
[ FROM from_item [, ...] ]
[ WHERE condition ]
[ GROUP BY expression [, ...] ]
[ HAVING condition [, ...] ]
[ WINDOW window_name AS ( window_definition ) [, ...] ]
[ { UNION | INTERSECT | EXCEPT } [ ALL | DISTINCT ] select ]
[ ORDER BY expression [ ASC | DESC | USING operator ] [ NULLS { FIRST | LAST } ] [, ...] ]
[ LIMIT { count | ALL } ]
[ OFFSET start [ ROW | ROWS ] ]
[ FETCH { FIRST | NEXT } [ count ] { ROW | ROWS } ONLY ]
[ FOR { UPDATE | SHARE } [ OF table_name [, ...] ] [ NOWAIT ] [...] ]
DESCRIPTION
SELECT INTO creates a new table and fills it with data computed by a query. The data is not returned to the client, as it is with a normal
SELECT. The new table's columns have the names and data types associated with the output columns of the SELECT.
PARAMETERS
TEMPORARY or TEMP
If specified, the table is created as a temporary table. Refer to CREATE TABLE (CREATE_TABLE(7)) for details.
UNLOGGED
If specified, the table is created as an unlogged table. Refer to CREATE TABLE (CREATE_TABLE(7)) for details.
new_table
The name (optionally schema-qualified) of the table to be created.
All other parameters are described in detail under SELECT(7).
NOTES
CREATE TABLE AS (CREATE_TABLE_AS(7)) is functionally similar to SELECT INTO. CREATE TABLE AS is the recommended syntax, since this form of
SELECT INTO is not available in ECPG or PL/pgSQL, because they interpret the INTO clause differently. Furthermore, CREATE TABLE AS offers a
superset of the functionality provided by SELECT INTO.
Prior to PostgreSQL 8.1, the table created by SELECT INTO included OIDs by default. In PostgreSQL 8.1, this is not the case -- to include
OIDs in the new table, the default_with_oids configuration variable must be enabled. Alternatively, CREATE TABLE AS can be used with the
WITH OIDS clause.
EXAMPLES
Create a new table films_recent consisting of only recent entries from the table films:
SELECT * INTO films_recent FROM films WHERE date_prod >= '2002-01-01';
COMPATIBILITY
The SQL standard uses SELECT INTO to represent selecting values into scalar variables of a host program, rather than creating a new table.
This indeed is the usage found in ECPG (see Chapter 33, ECPG - Embedded SQL in C, in the documentation) and PL/pgSQL (see Chapter 39,
PL/pgSQL - SQL Procedural Language, in the documentation). The PostgreSQL usage of SELECT INTO to represent table creation is historical.
It is best to use CREATE TABLE AS for this purpose in new code.
SEE ALSO
CREATE TABLE AS (CREATE_TABLE_AS(7))
PostgreSQL 9.2.7 2014-02-17 SELECT INTO(7)