Cursor  for loop implicitly declares %ROWTYPE as loop index,opens a cursor, fetches rows of values from active set into fields in the record and closeswhen all the records have been processed.      eg. FOR emp_rec IN C1 LOOP          salary_total := salary_total +emp_rec sal;         ...

vasu

• Oct 20th, 2012

Cursor for loop is the one by using this we need not to perform open, close, fetch operations of a cursor..

PRADEEP

• Oct 17th, 2012

If we use explicit cursor we need to open the cursor and fetching the data and close the cursor.

If we use cursor for loop cursor will open the cursor and fetching data and close the cursor automatically.

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With what ways can we find out instance locks?

Jose George

• Oct 22nd, 2012

V$lock contains details of locks

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Can a type body be dropped without dropping the type specification?

ramya

• Oct 31st, 2012

When you drop a type body, the object type specification still exists, and you can re-create the type body. Prior to re-creating the body, you can still use the object type, although you cannot call the member functions.

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chiatanya

• Nov 5th, 2012

Implicit cursors are automatically generated,when a sql statement is processed where as

Explicit cursors are user defined.

VASU

• Oct 20th, 2012

Implicit cursors returns only single record..where as explicit cursor multiple records. But it process record by record.

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Hi, What is nocopy parameter in oracle procedure. what is the use of it. In which situation,we can use the nocopy parameter.Thanks,Saravanan.P

Himansu

• Nov 6th, 2012

In procedure,Function there are three types of parameter is there. eg-IN, OUT, INOUT. IN parameter is call by reference and OUT & INOUT are call by value. Always call by reference is faster than call ...

Saket

• Apr 3rd, 2012

Pass by reference: "IN" Case
Pass by value : "Out" or "IN OUT" Case which have the overhead of copying the value to new procedure parameter.
In order to make to Pass by reference we will use NOCOPY
Pass by reference: "OUT NOCOPY" or "IN OUT NOCOPY" which deals which the actual reference value.

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What are the types of collection in PL/SQL? What is the advantage of nested tables?

pawan

• Nov 6th, 2012

Varrays,nested tables,index by tables are oracle collection.Index by tables also known as associative array similar to hashtables in java. Varrays are like arrays in java static in nature need to d...

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What is an autonomous transaction?

Sonal

• Nov 8th, 2012

The AUTONOMOUS_TRANSACTION pragma changes the way a subprogram works within a transaction. A subprogram marked with this pragma can do SQL operations and commit or roll back those operations, without ...

VASU

• Oct 20th, 2012

BY USING AUTONOMOUS TRANSACTION
WE GET THE FOLLOWING ADVANTAGES
WE PROCEDURE HAVING TRANSACTIONS STATEMENTS WE CALL PROCEDURE AUTOMATICALLY EFFECT THE ABOVE TRANSACTIONS ALSO TO OVERCOME THAT PROBLEM WE HAVE TO USE AUTONOMOUS TRANSACTION..

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Hasan

• Dec 15th, 2012

Truncate is a ddl...delete is dml
cannot rollback data in truncate...rollback data in delete
truncate -delete entire data not structure...it delete specific datas

VASU

• Oct 20th, 2012

By using delete we have to delete particular records only..
If we use truncate we cannot retrieve the data permanently...

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rayavarapu

 Profile Answers by rayavarapu Questions by rayavarapu

• Jan 23rd, 2013

Null is not a value and not a string. It is unknown it is maximum in descending order and minimum value in ascending order.

Sandeep

• Mar 7th, 2012

Char(0)

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In what ways can data be copied from one table to another?

Neeraj Saxena

• Apr 12th, 2013

You can copy the data from one table to another with the help of below Query:

Suppose dummy is the main table and we need to copy the data from dummy_120413 table.

Create tabel dummy_120413 as Select * from dummy;

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rajkumar1237

 Profile Answers by rajkumar1237 Questions by rajkumar1237

• Apr 27th, 2013

OCI means::oracle call interface.is a interface api used to access oracle database from C programs. Data Guard stands for it is multiple DB servers environment configured for Physical as well as Logic...

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There are 2 tables, A and B having 3 rows each. What will be result on executing the following query? : SQL> select * from A,B

Raju TT

• Jun 11th, 2013

Cross join -cartesian product :Table a no. of rows (3) * Table b no.of rows (3)= cross join query returns 9 rows

Code
 

Arpit Agrawal

• May 24th, 2013

Here simply answer would be 6. Since a is having 2 rows and b is having 3 rows. And we go for Cartesian join, which means 3*2=6.

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Vinod Tuteja

• Jun 14th, 2013

Main Difference : Referential
Index is created in both Cases (Unique and Primary key Constraint )

But can't references Columns with combination of UNIQUE and NOT NULL. Like in Primary key ,we Can references primary key to make foreign key constraint .

z_ashwini

 Profile Answers by z_ashwini Questions by z_ashwini

• Jan 13th, 2012

Eg: Consider table emp with EMP_ID,EM|NAME,ADD columns You can define the column e_name as Unique constraint. DECLARE e_name number(10) NOT NULL; BEGIN ... .. END: Primary key cannot have NU...

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Is it possible to use function inside a trigger.

tinku981

 Profile Answers by tinku981 Questions by tinku981

• Jun 16th, 2013

Code
span style="font-style: italic;">--referencing old as old and new as new

tinku981

 Profile Answers by tinku981 Questions by tinku981

• Jun 16th, 2013

Yes, by using CALL statement.

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Varun Tiwari

• Jul 4th, 2013

Any data transaction control statement can not be used in triggers. As trigger invokes due to any DML event and the transaction may not be successfully commit later and may need to complete rollback.

Pragma_autonomous can be used as an alternate way to commit.

prashant mhatre

• Jun 13th, 2013

Can not used ...if we want to use it inside the trigger then use pragma_autonomous.

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Create a query using “ group by” that shows maximum salary for each department?

lviswanath

 Profile Answers by lviswanath Questions by lviswanath

• Jul 17th, 2013

Code
 

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If there are 2 overloaded procedure, one among then have 1 IN parameter and another have 2 parameters. Both procedures parameters are of default type.

What will happen when you will call package.procedure without any parameter?

Khamar

• Jul 22nd, 2013

You will get an error message "PLS-0037: too many declarations of procedure_name match this call"

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DEPARTMENT_ID EMP_COUNT DEPT_PERCENTAGE

lviswanath

 Profile Answers by lviswanath Questions by lviswanath

• Jul 23rd, 2013

Ask the question clearly

what is DEPT_PERCENTAGE

on what basis we have to calculate DEPT_PERCENTAGE?

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JILEY SINGH

 Profile Answers by JILEY SINGH Questions by JILEY SINGH

• Aug 4th, 2013

Function can be called in select statement but procedure cant be called in select statement. function has return keyword but procedure not

Varun Tiwari

• Jul 4th, 2013

Function Procedure 1. Can be used as column Cant used in select statement in select statement 2. Can be used in where Cant used in where condition c...

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Procedure A calls procedure B. A updates table t1, t2. B updates table t3. If some error happens to B what happens to the updates in all those tables? Whether they will rollback or commit? If commits how far it will commit?

vishal.bhadange

 Profile Answers by vishal.bhadange Questions by vishal.bhadange

• Aug 24th, 2013

CASE 1 (If you are not handling exception in Procedure B, none of the table gets updated) "sql PROCEDURE A BEGIN UPDATE TABLE t1; UPDATE TABLE t2; CALL PROCEDURE ...

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