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SQL Interview Questions and Answers

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SQL Interview Questions & Answers


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Questions Question: Find out nth highest salary from emp table ? How will you a activate/deactivate integrity constraints ?
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Questions Question: What are the more common pseudo-columns ? What are the different types of SQL ? What is the maximum SIZE allowed for each type Other way to replace query result null value with a text ? Display the number value in Words ? Any three PL/SQL Exceptions ? What are the data types allowed in a table ? How to access the current value and next value Explain the different types of joins What is ROWID ? Implicit Cursor attributes ? What is the fastest way of accessing a row in a table ?
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Questions Question: What are the different table spaces in database ?
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Questions Question: how to check the integrity of a database.
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Questions Question: how do u connect the tables to ur project using scalars
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Questions Question: HOW TO GET THE ALTERNATE COLUMNS IN A TABLE, IF ANY BODY KNOWS PLS., SEND TO ME
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Questions Question: what is trigger i general term.
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Questions Question: WHICH IS LATEST VERSION OF SQL
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Questions Question: How to retrieving the data from 11th column to n th column in a table.
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Questions Question: what is the difference between oracle,sql and sql server
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Questions Question: on index why u need indexing ? where that is stroed and what u mean by schema object? for what purpose we are using view
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Questions Question: What is ORA-1555?
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Questions Question: Difference between Store Procedure and Trigger
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Questions Question: When using a count(disitnct) is it better to use a self-join or temp table to find redundant data, and provide an example?
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Questions Question: What is the advantage to use trigger in your PL?
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Questions Question: What the difference between UNION and UNIONALL?
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Questions Question: How to find second maximum value from a table?
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Questions Question: How to display duplicate rows in a table?
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Questions Question: What is the relation between free list and buffer busy wait?
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Questions Question: Which system table contains information on constraints on all the tables created
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Latest 10 Answers
When there is any situation that u should attach a new patch to ur kernel , then download the patch and install it,to make changes to kernel , go to ok prompt and type boot -r, it will update or reconfigure the kernel
Honesty, helpful and reliable
procedure is a set of sql statement ,are combined to gether to perform a specific task or to solve a specifi problem.it does not return value.
leadership is power to influence a group so that the members willingly exert efforts as aspired by the leader.
I have the unique combination of technical skill and the ability to build strong customer relationship. I have the ability to stay focussed in stressfull situation. I would be great addition to your team.
first execute the bc search spec to fetch the data then executes the applet search spec if applet search spec is not match with bc it skips
TCP-Transmission Control Protocol. TCP is Reliable. TCP is Connection oriented. UDP-User Datagram Protoco UDP is Unreliable. UDP is Connectionless.
By default in structure all data member and member function are public,i,e if you not mentation any access specifier. But in case of class By default all data member and member function are private.
Structure is a user defined data type. By default all structure variables are public type and we cann't use access specifier in structure type variable, where as in class we can define objects(variables) under required access specifier type.
variable cost is the cost which is not fixed in nature

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