What are different types of keys?

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How write primary and foreign key relationship between two tables without using constraints? u can use any of procedure/function/trigger and any sql?

1 Answers   Parexel,

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Can we use joins in subquery?

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what is meant by nl2br()? : Sql dba

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How do I run a sql query?

0 Answers  

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how a reference cursor works?what all adnvantages are gained with it..specify the situation?

4 Answers   TCS,

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How many types of cursors are available in pl/sql?

0 Answers  

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what is the difference between varray and table data type..please expalain with some examples... under what situation you will go for varray..instead of index by table...

1 Answers   HCL, Satyam,

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How to revise and re-run the last sql command?

0 Answers  

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we have a package and we have grants to execute that package inside of that we have table, here we don't have privileges to this table? whether this package will execute or not?

3 Answers   TCS,

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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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What do you mean by dbms? What are its different types?

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