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

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DB Architecture (141)
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DB Development (113)
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Database Management (1411)
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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 8438

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 4522

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 7097

what is the diffrence between core dba and apps dba?

Cap Gemini,

2571

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 3949

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 8296

how to get last monday of a month?

Multifonds,

2 6469

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

BirlaSoft,

1 5887

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,

2185

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 22256

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

ABCO,

2 9394

What Is The Difference Between Primary Key & Super Key

Accenture,

3 7471

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,

2241

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 6549

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

1 8370

Un-Answered Questions { Databases }

What is greenplum db?

793

What is limit in dbms?

1048

How to recreate the index on a firebird table?

908

How to get a list of columns using the "sys.columns" view in ms sql server?

954

Can excel convert to access?

897

Can primary key be a foreign key?

1059

What is the default port for mysql and how it can change?

1063

What is authorization and integrity manager?

974

What is SDL (Storage Definition Language)?

801

What is the recursive stored procedure in sql server?

1021

How to find the time taken for rollback of the processed?

968

Write the syntax for creating a collection and dropping a collection in mongodb.

What is "transparent DBMS"?

862

What is the quickest way to fetch the data from a table?

1058

How to display the records between two range in Oracle SQL Plus?

1147

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