How many primary keys can a table have?

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What is data modelling in sql?

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What is Histogram?

0 Answers   NIIT,

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Table 1: col1 Timestamp ---------------- 01-mar-2012 11:12:46 Table 2: col2 Timestamp -------------------- 01-mar-2012 11:12:10 01-mar-2012 11:11:23 Write a query to display a row with table2 col2 value less than tabl1 col1 value. Maximum timestamp value previous to table1 col1 value. Display a result as: Col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10

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What are the types of join and explain each?

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i hv 30 rows with date.ex:1month hav 4 weeks i want 1st day of the every week.write the qry for that.example jan has 4 weeks i need 1st dd for evry wk

1 Answers   Aspire,

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What are all types of user defined functions?

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What is sql exception?

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Can we create view in stored procedure?

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What do we need to check in database testing?

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Store procedure will return a value?

4 Answers   eMids,

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What are the two types of exceptions in pl/sql?

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