Question

I want to write SQL query which select some columns from the first table and all columns from the second table.

ID is the PK in table1 and id is the FK in table2.

Is this correct:

SELECT ID, table2.ALL
FROM table1
INNER JOIN table2 ON table1.ID = table2.id 
WHERE table1.ID= x AND table1.Column3 = 'y'

Answer 1

Do you have a column called ALL in table2 or do you want to select all columns from table2 ??

If you want all columns use table2.* instead:

SELECT table1.ID, table2.*
FROM table1 
INNER JOIN table2 ON table1.ID = table2.id 
WHERE table1.ID= x AND table1.Column3 = 'y'

Also, since you have ID in both tables, you need to specify which one to select in your statement.

Update: if you don’t want all columns from table2, then you need to explicitly specify the columns that you do want:

SELECT 
    t1.ID, 
    t2.column1, t2.column2, ....., t2.columnN
FROM table1 t1 
INNER JOIN table2 t2 ON t1.ID = t2.id 
WHERE t1.ID= x AND t1.Column3 = 'y'