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SQL INTERVIEW QUESTION & ANSWERS

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116. What is Magic Table in SQL?
  The Insert and Delete commands are known as magic tables in SQL.
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117. What are the four types of string data types?
 
    String data types are :
  • Character strings
  • National character strings
  • Bit strings
  • Binary strings
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118. Which keyword should you add to an ORDER BY clause to sort data in descending order?
  DESC
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119. What is a pre–requisite for connection pooling?
  Multiple processes must agree that they will share the same connection, where every parameter is the same, including the security settings.
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120. What are some major disadvantages of using indexes?
 
    Major disadvantages of an index include
  • Slowing batch jobs
  • Storage space on the disk
  • Maintenance upkeep on the index.
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