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

SQL PLSQL Interview Questions

Questions Answers Views Company eMail

Which is faster count (*) or count 1?

1035

Why use subqueries instead of joins?

1079

Which normal form is best?

948

Why are indexes and views important to an organization?

956

Which join is default?

952

What is before and after trigger?

958

Can I call a procedure inside a function?

1011

Which is better join or subquery?

1136

What is the difference between instead of trigger and after trigger?

1010

Why we use cross join?

952

Why indexing is needed?

983

Why is normalization important?

1027

Which is faster subquery or join?

1217

Why do we need unique key in a table?

956

Which is the correct statement about truncate and delete?

1111

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Un-Answered Questions { SQL PLSQL }

Can we join two tables without common column?

1001

Explain the order of sql statement execution?

1045

What is the difference between cross join and natural join?

1020

What are the usages of sql?

1058

How do you identify a primary key?

1063

How to prepare for oracle pl sql certification?

1064

Which column of the user triggers data dictionary view displays the database event that will fire the trigger?

1024

What are tables in sql?

1065

Which tcp/ip port does sql server run?

1005

What is raid? How does it help storage of databases?

1087

Explain the purpose of %type and %rowtype data types?

928

how many groups of data types? : Sql dba

1026

Can we use pl sql in mysql?

1013

What is benefit of creating memory optimized table?

971

What is the maximum rows in csv?

920

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