SQL PLSQL Interview Questions
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hi sql gurus, here is my question 4 u. i wanna use triggers for sending reminder mail to all users who are registered to the site. if any one knws the code plz send me ans here : chayabs3@gmail.com thnx advance

1 4717

..........refers to the disk mirroring

iFlex,

2 3564

there are .......different types of serializability

Wipro,

1 7891

What are the new features in Oracle 10g. Compared to Oracle 9i?

Polaris,

1 9045

How would you go about increasing the buffer cache hit ratio? 0. Explain the difference between a hot backup and a cold backup and the benefits associated with each 1. You have just had to restore from backup and do not have any control files. How would you go about bringing up this database? 2. How do you switch from an init.ora file to a spfile? 3. Explain the difference between a data block, an extent and a segment. 4. Give two examples of how you might determine the structure of the table DEPT. 5. Where would you look for errors from the database engine? 6. Compare and contrast TRUNCATE and DELETE for a table. 7. Give the reasoning behind using an index. 8. Give the two types of tables involved in producing a star schema and the type of data they hold. 9. What type of index should you use on a fact table? 10. Give two examples of referential integrity constraints. 11. A table is classified as a parent table and you want to drop and re-create it. How would you do this without affecting the children tables? 12. Explain the difference between ARCHIVELOG mode and NOARCHIVELOG mode and the benefits and disadvantages to each. 13. What command would you use to create a backup control file? 14. Give the stages of instance startup to a usable state where normal users may access it. 15. What column differentiates the V$ views to the GV$ views and how? 16. How would you go about generating an EXPLAIN plan?

2 5007

What does “select count(*) from tab” result?

IBM, Student, Wipro,

15 24019

What does “select count(1) from tab” result?

IBM,

9 18157

suppose we have a table in which 200 rows. i want to find 101 row ? what the query.... and how we find 4th and 5th highest salary and 1 to 10 highest salary

7 10608

I have 2 Databases. How can create a table in particular database? How can i know the list of tables presented each database?( in oracle 10g)

Relq,

5 7938

What is the default value of CHAR type?

Bosch,

3 8617

how many tupples can insert in 1 second in sql

1 4953

Describe the Index, Types of index, At what situation we have used? Which one s better than others?

IBM, TCS,

1 2918

why sql is used as interpreter frequently rather than a compile?

1 4701

I have a Employee table with columns ename,eid,salary,deptno. How to retrieve sum of salary for each deptno?

L&T,

8 14220

I have done oracle 10g. I need a project knowledge. So if u please send a project how it should be done,Or you can send email link. I will be very grateful to u.

1 3204


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Un-Answered Questions { SQL PLSQL }

What is query optimization in sql?

529


Can we insert in sql function?

513


What is faster join or subquery?

487


Explain what is a view?

573


What are the subsets of sql?

533






How to change a value of the field ‘salary’ as 7500 for an employee_name ‘john’ in a table employee_details?

865


What is the usage of distinct keyword?

606


Explain character-manipulation functions?

599


What's the difference between inner join and left join?

486


what are different types of keys in sql?

584


Can we commit in trigger?

522


how to drop an existing table in mysql? : Sql dba

535


Can we insert data into materialized view?

485


Can I call a procedure inside a function?

530


What is set serveroutput on?

615