what is the difference between a having clause and a where clause? : Sql dba

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What is primary key in db?

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table structure: ---------------- col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10 01-mar-2012 11:12:46 01-mar-2012 11:11:23 Write a query to display the result as shown below: col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10

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how to implement one-to-one, one-to-many and many-to-many relationships while designing tables? : Sql dba

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what is the difference between mysql_fetch_object and mysql_fetch_array? : Sql dba

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1. how to use the check option constraints in sql query..? 2.how to add data in a complex query ? 3.is it possible to use commit or rollback or savepoint in triggers...if not why please explain with examples...? 4.what is the difference between meterialized view and normal view..how to create materialized view and how to use it..? 5.what is varray...? what is the advantage of the varray ? please expalin with a simpel example..i want to load into a table (student no and name and his marks..) please give example.. 6.what are the bulk bind exceptions...how to use bulk bind and how to use bulk collect..please explain with example... 7.what is for update of and where current of ...? 8 what is the use of nowait ? 9.please give an example for nocopy in a simple plsql query 10.create an index in a table...tellme how to use the index in a where clause to do performance tunning...

3 Answers   Satyam,

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Name some usages of database trigger?

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What is a procedure in pl sql?

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I have a procedure in a procedure. The inner procedure contains out parameter. How I can call the inner procedure in the out procedure and send the inner procedure parameter value(out parameter value) into out procedure?

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What are the differences between Database Trigger and Integrity constraints ?

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How is use pl and sql?

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how to find the First and Last Observation from the table: Ex: OBS Name Sal Ans like: OBS Name Sal 105 E 5000--> 105 E 5000 102 B 2000 104 D 4000 103 C 3000 101 A 1000--> 104 D 4000

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