What are the sql commands?
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What are the return values of functions SQLCODE and SQLERRM ?
Difference between SUBSTR and INSTR?
Explain raise_application_error.
Why do we use joins in sql?
Is it possible to sort a column using a column alias?
What is a clob in sql?
Explain correlated query work?
Is left join inner or outer by default?
Why is stored procedure faster than query?
what are the system privileges that are required by a schema owner (user) to create a trigger on a table?
Is a secondary key the same as a foreign key?
What is the use of count (*) in sql?
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