Performance issue in update query

Question

I have one small doubt in query performance. Basically, I have a table with more than 1C records. sl_id is the primary key in that table. Currently, I am updating t

Answer 1

Definitely you should use WHERE IN operator. Making 200 queries is much slower than one bigger. Remember, when you sending query to database, there is additional time needed to communicate between server and DB and this will crush your performance.