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i have a Database with column username and password. user will key in username and password in a textbox. <br />
i need SQL code to check, if username in the Database then return true. &nbsp;if username not avialable in the database then return false.<br />

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i have a Database with column username and password. user will key in username and password in a textbox. 
i need SQL code to check, if username in the Database then return true.  if username not avialable in the database then return false.


SQL return true or False

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SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.