Problem with query in SQL

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I want to get all raws of a table and only one of an other table, a think like this:

select * from table_1 and select id_prod from table_2

What I have tried:

I tried to write query with heidi but without success

Posted 17-Oct-19 23:09pm

Member 14594285

Updated 18-Oct-19 1:49am

RickZeeland

v2

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RickZeeland · Answer 1 · 2019-10-17T23:24:00

Solution 1

You need to use JOIN, see examples here: SQL Joins[^]

Another option is UNION, this can also be used for non-related tables: SQL UNION Operator[^]

To select only one row use TOP: SQL SELECT TOP, LIMIT, ROWNUM[^]

Posted 17-Oct-19 23:24pm

RickZeeland

Updated 17-Oct-19 23:27pm

v3

Comments

Member 14594285 18-Oct-19 5:34am

yes but with join I select all rows that have a correspondence, I want only a specific raw

RickZeeland 18-Oct-19 5:42am

You can also use DISTINCT in combination with a WHERE clause, see the examples on the W3Schools website. It pays to study SQL as it is used almost everywhere.

srko · Answer 2 · 2019-10-18T01:49:00

This will take all rows from 1st table and only 1st row from second table

SQL

select * from myTable
union all (select top 1 * from myTableDuplicate)

Output

Id	fName	
1	Srikanth
2	sunil	
3	Shilpa	
1	Srikanth

This will take all the columns from the first table and only Id column from the second table

SQL

select * from myTable M
join (select ID from myTableDuplicate) as D on M.Id=D.ID

Output

Id	fName		ID
1	Srikanth	1
2	sunil		2
3	Shilpa	    3