Answer / rajan vardawaj

CHAR is a fixed length data type. CHAR(n) will take n
characters of storage even if you enter less than n
characters to that column. For example, “Hello!”

will be stored as “Hello! ” in CHAR(10) column. VARCHAR is a
variable length data type. VARCHAR(n) will take only the
required storage for the actual number

of [...]

Answer / shekoli

Char is a fixed lenth datatype. Ex: char(7), welcome

but varchar is a variable length datatypes, Ex:
varchar(7),welcome (or) come

How do I optimize a selected query in mysql?

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I have a table like this tblData (month int,Qty int) and i am inserting three rows in this table 1.tblData Values (1,100) 2.tblData Values (2,200) 3.tblData Values (3,300) The Result I want is the Running total of the field Qty that is 1 100 100 2 200 300 3 300 600 What is the Query for that ?

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How to shut down the server with 'mysqladmin'?

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What is a select query?

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