Databases Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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Databases Interview Questions

Questions Answers Views Company eMail

hi friends please answer this question ASAP:- how to count the no. of employee in a each department or no. of employee in each location by using emp/dept table

Indecomm,

7 8649

write a sql query following source looking like below column1 column2 101,102,103 abc,def,ghi 1001,1002,1003 a,b,c i want the output column1 column1 101 abc 102 def 103 ghi 1001 a 1002 b 1003 c

KPIT,

1 4590

write sql query following source are EmpID, Salary 101 1000 102 2000 103 3000 I want the output format like following empid,sal,composite_sal 101 1000 1000 102 2000 3000 103 3000 6000

TCS,

4 7265

what is the diffrence between core dba and apps dba?

Cap Gemini,

2624

Display the order number and the number of months since the order was shipped for all orders that have been shipped in the last year (365 days). (Hint: Unshipped orders will have a null value).

1 4029

i have xml source. xml source having lacks of records. i want extract/retrive xml source data using sql query. please tell me how to write query.

TCS,

4 8468

how to get last monday of a month?

Multifonds,

2 6595

Explain the statement?? ALTER TABLE TABLE_NAME MOVE; What it the use of above statement??

BirlaSoft,

1 5960

I just want to maintain data like an employee can belongs to 3 or more departments . We can resolve this by using composite key but it avoids normalization rules. So Can anyone tell me how can I maintain data.

IBM,

2246

i have table T!. A B C D NULL 1 2 3 4 NULL 5 6 7 8 NULL 9 10 11 12 NULL. I WANT COUNT OF NULL VALUES IN TABLE. WRITE A QUERY.

iGate, Wipro,

14 22708

write a query to remove duplicate records without using primary key column?

ABCO,

2 9489

What Is The Difference Between Primary Key & Super Key

Accenture,

3 7615

I have a table Events Events containing cardno,time,id,name--each id has a cardno my requirement is every day each employee swipe the card several times i want to calculate first and last time of each card the output should be name 1 2 6 7 in out in out holiday holiday xxx 09:30 06:30 09:40 06:45 where 1,2...... are dates for example january 1,2, etc. 6 and 7 are saturday and sunday how it is posssible

HCL, Wipro,

2292

I have a table emp. There is only one column in the table. In that , there are only three rows in that column. The value in the first row is 'A' and the value in the second row is 'B' and the third row is 'C'. Now, my question is , How will you write a select query to display the output as B C A Note: order by cannot be used coz it gives us output as CBA. But the output should be BCA.

4 6684

what is d diff between grant,commit,rollback n savepoint

1 8452

Un-Answered Questions { Databases }

What is data source document?

1089

What is tuple in dbms?

918

how to calculate expressions with sql statements? : Sql dba

1095

What should be the fill factor for indexes created on tables? : sql server database administration

1178

What do you mean by atomicity and aggregation?

953

What is Object Oriented model?

1075

Write a query to get maximum and second maximum in oracle?

1099

What are the benefits of oracle real application clusters (rac)?

What is a sql driver?

1040

What do you understand by clause in sql?

1087

Is mysql still popular?

965

Create and insert into temp table in sql server?

1083

What are the different column comparison operators in mysql?

991

How to open the database in exclusive mode?

1088

Indexes are updated automatically is the full-text index also updated automatically?

1065

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