amir ali

• Nov 23rd, 2015

Views are dependent on data tables.

PADMINI M

• Nov 16th, 2015

Correct answer is it depends.
Any modifications, including UPDATE, INSERT, and DELETE statements, must reference columns from only one base table
Only we can update a view in one base table.

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Lavanish Chaudhary

• Jul 1st, 2018

A database view is a searchable object in a database that is defined by a query. Types of view in a database management system:
A. Simple view
B. Complex view
C. Readable view
D. Force view
E. Materialized view
F. Inline view

Nagaraj

• Nov 13th, 2017

1. Updatable view & Non-updatable view
2. Simple view & complex view
3. Read only view
4. Force view
5. Meterialized view
6. Inline View

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Answered by: Karanjeet

• Nov 22nd, 2005

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Following are the tier types in a client server application:

a. 1 tier application:All the processing is done on one machines and number of clients are attached to this machine (mainframe applications)

b. 2 tier application: Clients and data base on different machines.Clients are thick clients i.e.? processing is done at client side.Application layer is on Clients.

c. 3 tier application.Client are partially thick.Apart from that there are two more layers application layer and database layer.

d. 4 tier application: Some clients may be totally non thick clients some clients may be partially thick and further there are 3 layers web layer, application layer and database layer.

Avinash

• Nov 24th, 2012

If I am not wrong

Class variables are variables which we create inside a class.

&

Class member are the variables & function declared inside class.

Manoj Kumar Chagantipati

• Jun 12th, 2012

In Two tier there will be Presentation layer and Data base layer
Where as in Three tire there will be Presentation layer,Data access layer and Data base layer

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letsconverse  

 Profile Answers by letsconverse Questions by letsconverse

• Member Since Sep-2009 | Sep 21st, 2009

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This one is better I guess:

query:

SELECT ((count(DECODE(to_char(hire_date,'YYYY'), 1995, 'c1')) )+(count(DECODE(to_char(hire_date,'YYYY'), 1996, 'c2')))+(count(DECODE(to_char(hire_date,'YYYY'), 1997, 'c3')))+(count(DECODE(to_char(hire_date,'YYYY'), 1998, 'c4')))) as TOTAL,
count(DECODE(to_char(hire_date,'YYYY'), 1995, 'c1')) "1995",
count(DECODE(to_char(hire_date,'YYYY'), 1996, 'c2')) "1996",
count(DECODE(to_char(hire_date,'YYYY'), 1997, 'c3')) "1997",
count(DECODE(to_char(hire_date,'YYYY'), 1998, 'c4')) "1998"
FROM employees;

Results for the above query is like:

     TOTAL       1995       1996       1997       1998
  ----------   ----------   ----------  ----------  ----------
          65             4            10           28           23

Revert if you have a question. I'll try.
NOTE: You may want to change the spl characters and the years based on your requiremnet.

Thanks

serine

• Aug 26th, 2016

Why did we use c1?

ashwini

• Jun 22nd, 2015

Can anybody tell me how to get the count of the test cases that was run by a person?

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Amit

• Aug 28th, 2016

Adding 2 cents 1) DELETE is DML command because it does not change data dictionary (Every command which changes data dictionary tables is called DDL command ) TRUNCATE is DDL command is changes stor...

Ashakant Kendre

• May 9th, 2016

1>TRUNCATE is a DDL command whereas DELETE is a DML command. 2>TRUNCATE is much faster than DELETE. Reason: When you type DELETE. All the data get copied into the Rollback Tablespace first, then del...

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