How do I find duplicates in sql?
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What is sql stand for?
need to split a string into seperate values. eg. col1 col2 ---------- 100 - 'a,b,c' 200 - 'a,x,b,d,e' 300 - 'c' result: value count ------------- a - 2 b - 1 c - 2 etc.
What is Referential Integrity?
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what is a materialized view? : Sql dba
How many primary keys can a table have?
Explain the PL/SQL compilation process.
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