SQL INTERVIEW QUESTION & ANSWERS
116. |
What is Magic Table in SQL? |
|
The Insert and Delete commands are known as magic tables in SQL. |
117. |
What are the four types of string data types? |
|
String data types are : - Character strings
- National character strings
- Bit strings
- Binary strings
|
118. |
Which keyword should you add to an ORDER BY clause to sort data in descending order?
|
|
DESC |
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. |
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.
|