What are the different types of sql commands?

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What is the diffrence between IN and EXISTS.which one is faster.

3 Answers   Infogain,

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how to Update table Sales_summary with max(sales) data from table sales_dataTable 1. sales_data table Table 2. Sales_summary Region sales Region sales N 500 N 0 N 800 W 0 N 600 W 899 W 458 W 900 I want the Sales_summary After Update like this Region Sales N 800 W 900

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Describe types of sql statements?

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what are the methods using performance tunning in sql and pl/sql

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i have a word ***********hello********world******. I require a o/p **********hello world**********, Need to delete the middle stars.

3 Answers  

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What are user defined functions?

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Is primary key a clustered index?

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Define SQL and state the differences between SQL and other conventional programming Languages?

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what is blob? : Sql dba

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how do you know if your mysql server is alive? : Sql dba

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Why we use join in sql?

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