Hi Guys,
I am looking for some help to frame the update query.
I have two tables temp_1 and temp_2.
I want to update temp_2 based on data from temp_1. However i do not want to make an update where temp_1 has null value.
One approach i can think of is creating two different update statements but is there any chance to get it done through
only one statement. Also i would like to add here that temP_1 has 250K data and i going to make update on approx 500K
rows from temp_2. So i need to look from performance point of view as well.
Temp_1 temp_2
Col1 Col2 Col3 col1 col2 col3
1 abc abc 1 null null
2 abc null 2 xyz xyz
3 null null 3 xyz null
After update i am looking forward to get data in below format.
temp_2
col1 col2 col3
1 abc abc
2 abc xyz
3 xyz null