Create table emp (id number(9), name varchar2(20),salary number(9,2)); The table has 100 records after table created.Now i nee to change id's Datatype is to be Varchar2(15). now Alter table emp modify(id varchar2(15),name varchar2(20), salary number(9,2)); Whether it will work or returns error? post answer with explanation.

13 Answers   Oracle, TCS,

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Define concurrency control. : Transact sql

0 Answers  

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Types of indexes. What is the default key created when a primary key is created in a table ?

5 Answers   TCS,

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Why commit is not used in triggers?

0 Answers  

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Write a sql query to convert all character to uppercase after hypen.

0 Answers  

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Can We write bulk collect statement in triggers?

1 Answers   Polaris,

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What are the disadvantages of file system?

0 Answers  

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Can you create a table with Primary Key not as the clustered index.

2 Answers   CGI,

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What do you mean by stored procedures? How do we use it?

0 Answers  

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How would you convert date into julian date format?

0 Answers  

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How global cursor can be declare with dynamic trigger ?

0 Answers  

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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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