What is a native sql query?

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If we have n no of columns in a table, can we add new column in that table with not null constraint?

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Can we insert data into materialized view?

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i have table T!. A B C D NULL 1 2 3 4 NULL 5 6 7 8 NULL 9 10 11 12 NULL. I WANT COUNT OF NULL VALUES IN TABLE. WRITE A QUERY.

14 Answers   iGate, Wipro,

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How to copy a table in another table with datas?

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Does user triggers have entry for trigger with compilation errors?

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HOW TO APPEAR FOR ONLINE EXAMS OF SQL & PL/SQL? WHICH BOOKS WILL BE BETTER FOR REFERENCE TO QUALIFY THESE EXAMS? ARE THERE ANY MODEL PAPERS AVAILABLE IN THE MARKET ABOUT SQL & PLSQL?

2 Answers  

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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how to convert dates to character strings? : Sql dba

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What does varchar include?

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What is bulk collect in pl sql?

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what is rollback? : Sql dba

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