What is on delete set null?
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How do you optimize SQL queries ?
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Explain the PL/SQL compilation process.
What is sql keyword?
What is the use of index in sql?
Can variables be used in sql statements?
What is the use of %rowtype?
Explain what is a database?
What is the use of pl/sql table?
Can a table have two primary keys?
Explain Connect by Prior?
what is SCALAR Queries?
i have one table with accounts and amounts as colums.accounts with columns c and d. and amounts with values 1000,2000,3000 for c and 4000,5000,8000 for d.i need to find the sum of these accounts c and d individually and find the differences between their sum using one select statement.
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