What is the use of count (*) in sql?
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Why is a trigger used?
What are the advantages of sql?
need to split a string into separate values. eg. col1 col2 ---------- 100 - 'a,b,c' 200 - 'a,x,d,e' 300 - 'c' result: value count ------------- a - 2 b - 1 c - 2 etc.
What are the string functions in sql?
What is the current version of postgresql?
Why query optimization is needed?
Is crud a cuss word?
What is composite primary key in sql?
Types of joins?
What are commit, rollback, and savepoint?
What does data normalization mean?
Can we group by two columns in sql?
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