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

What is Function based Index and which type of function we can use in Function base index. can we use aggregate,NVL function in Function based Index..

Metric Stream, Polaris,

1 4127

Please can the SQL code below be interpreted IF @xMatchCriteria='MATCH12' BEGIN IF EXISTS (Select * from #InsightData where (EmailAddress=@xDCPEmailAddress ) ) BEGIN SET @xTestMatchCriteria = @xMatchCriteria; SELECT @xCRMCustomerId=CustomerId, @xCRMDcpCustomerId=DcpCustomerId, @xCRMPortalCustomerID=PortalCustomerID,@xCRMDcpID=DcpID, @xCRMCardNumber=CardNumber, @xCRMEmailAddress=EmailAddress, @xCRMfirtLetterFirstName=firtLetterFirstName, @xCRMLastName=Surname,@xCRMAddressLine1=AddressLine1, @xCRMPostCode=PostCode FROM #InsightData where (EmailAddress=@xDCPEmailAddress ) END ELSE BEGIN SET @xTestMatchCriteria='No'+@xMatchCriteria; END END

1696

How collections are improve the performance?

Polaris,

1 4373

How to find locks exists in a table or not?

HCL,

1 3542

how to reject duplicates in source sequential file and if by filter option then where is that filter option in the sequential file.

1670

If we update a complex view, is base table will get update ?

Ardee Technologies, HCL,

2 5529

Tab A A B ------ 1 A 2 B 3 C Tab B A B ----- 4 D 5 E 6 F Generate the value into B table from A table. Only table A has the value. Write the SQL query to get B table value.

TCS,

1837

What the is the diff between local index and global index. give some example.

TCS,

1687

What is snapshot is too old? Give and example for better understand.

TCS,

1655

Un-Answered Questions { Databases }

what purpose does the model database serve? : Sql server database administration

1028

Explain the architecture models of SQL Server?

2382

What are the different editions of oracle?

1183

What is postgresql service?

1002

Does any body has ORACLE Certification latest Dumps on 1) Oracle - 10g DBA, 2) Oracle - 9i DBA, 3) Oracle - Internet Application Developer, 4) OCA, 5) OCP 8i to 10g DBA Upgrade, 6) Oracle - 10g,7) Other Oracle Certification, if any body has please send it to taruni_2k8@yahoo.com

2707

How can you create and drop view in mysql?

974

Compare ‘postgresql’ with ‘nosql’?

921

Table1: Col1 col2 1 2 10 3 4 89 5 6 Table:2 Col1 col2 3 2 9 5 4 7 6 87 With the help of table1 and table2 write a query to simulate the fallowing results. Output1: Col1 col2 1 2 2 3 3 4 4 5 5 6 Output2: Col1 col2 2 3 10 4 5 89 6 7 1.Write query for single row to multiple row using sql statements. Eg:a,b,c,d,e,f Change to A B C D E F 2. Write query for multiple row to single row using sql statements. Eg2 A B C D E F Change to Eg:a,b,c,d,e,f Table1: Col1 col2 8 5 2 9 4 2 5 1.Write a query to select all the rows from a table1,if the value of A is null then corresponding B’s value should be printed in A’s value.if the value of A is null in that table then corresponding B’s value should be printed as 30. 2. write a query to find the sum of A and B .display the max among both. 3.write a query to find total number of rows from table 1. Note: if any column value is null in a row then that row should be considered as 2 rows. 4.write a query to display all the records of table1 except A containg 2 as well B containg 5. 5.rewrite the fallowing without using join and group by. Select b.title,max(bc.returneddate –bc.checkoutdate)” mostdaysout” From bookshelf_checkout bc, Book shelf B Where bc.title(+)=b.title Group by b.title. 6.rewrite fallowing query Select id_category from category_master X where exists (select 1 from sub_category Y where X.id_category=Y.id_category) Customer: Name phone1 phone2 phone3 bitwise A 23456 67890 12345 --- B 67459 89760 37689 --- Don’t_call Col1 67890 37689 1.q) update the customer table of bitwise with 1 or 0. Exists in don’t_call table menas show -1 Other wise -0. Output. Name bitwise A 010 B 010

2469

Is sql a backend language?

1146

How do I create a schema in mysql?

924

How long can an error message be in raiseerror function?

1047

What is database url?

1044

What are types of scd? : sql server analysis services, ssas

1082

What is microsoft access write its features?

853

What is serial sql?

1043

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