I have below block, and it is taking 8 to 9 hours for 450k data to complete. How to improve performance in that case? tab_a is having 10M data.

I get:
1
2 2
3 3 3
4 4 4 4

Two queries almost identical give different results see below:

I am trying to get the value from the itnum field which is TEST1234. (Need inside the two single quote)

Could someone help me on how to convert SQL(PL-SQL) from left join to (+)?

Requirement: to create a pivot table which will show output like this:

Requirement – To make a pivot table which will show output as below.

I have this main query de PL SQL DEVELOER DE ALLROUND AUTOMATION

I have this problem in my code and I can’t solve it

Wondering why the below code will output ‘hello’ twice? (when there is only 1 output line)
thanks.