Using left outer join in SQL
select table1.column_id,
table1.column_type,
table2.column_name
from table1
left outer join table2
on table1.column_type = table2.column_numb
In Table 1
column_id column_type
1 NULL
2 NULL
3 300
In Table 2
table2_column_id column_numb column_name
1 100 ABC
2 200 DEf
3 300 GHI
Expected value
column_id column_type column_name
1 NULL NULL
2 NULL NULL
3 300 GHI
My query is not picking the NULL Values. What could be the reason ??
table1.column_type,
table2.column_name
from table1
left outer join table2
on table1.column_type = table2.column_numb
In Table 1
column_id column_type
1 NULL
2 NULL
3 300
In Table 2
table2_column_id column_numb column_name
1 100 ABC
2 200 DEf
3 300 GHI
Expected value
column_id column_type column_name
1 NULL NULL
2 NULL NULL
3 300 GHI
My query is not picking the NULL Values. What could be the reason ??
ASKER CERTIFIED SOLUTION
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try the example that I posted
can you post data type for the columns in your table? or table structure?
can you post data type for the columns in your table? or table structure?
ASKER
@Eugenez, Thanks !! My syntax is correct, but some conditional filtration filters the NULL Value column. Thank you for checking !!
ASKER
i implemented same logic query in my production database, but records with null value is filtered.