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My goal is combining all rows in 2 tables. The simplest example I can think of is:
Table 1
Letter
A
B
Table 2
Number
0
1
Combined Table
Letter Number
A 0
B 0
A 1
B 1
I have come up with this SQL statement:
select * from
(
select * From (
select 'A' as 'Letter'
UNION
select 'B' as 'Letter'
) as Letter
) as Letter,
(
select * from (
select 0 as 'Number'
UNION
select 1 as 'Number'
) as Number
) as Number
This works but I don't like it.
Does anyone know a cleaner way of doing this? I am sure the answer is out there already but I had no idea how to search for it. Thanks all
774
(INNER) JOIN : Returns records that have matching values in both tables. LEFT (OUTER) JOIN : Returns all records from the left table, and the matched records from the right table. RIGHT (OUTER) JOIN : Returns all records from the right table, and the matched records from the left table.
An SQL query can JOIN multiple tables. For each new table an extra JOIN condition is added. Multi-Table JOINs work with SELECT, UPDATE, and DELETE queries.
Full Outer Join returns all the rows from both the table.
You can concatenate rows into single string using COALESCE method. This COALESCE method can be used in SQL Server version 2008 and higher. All you have to do is, declare a varchar variable and inside the coalesce, concat the variable with comma and the column, then assign the COALESCE to the variable.
Easy enough with CROSS JOIN...
SELECT *
FROM Table1
CROSS JOIN Table2
Result:
Letter Number
------------------------- -----------
A 0
B 0
A 1
B 1
(4 row(s) affected)
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