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What are you talking about using a checksum to do? There isn't anywhere near enough information in your question.
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What are you talking about using a checksum to do? There isn't anywhere near enough information in your question.

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I want to use checksum in sql query for improving performance of stored procedure. Before implementing checksum, i want to know what are the disadvantages of checksum in sql query &nbsp;(sql 2008/2012).<br />
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Could you please tell me the disadvantages/drawback of checksum in sql?
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I want to use checksum in sql query for improving performance of stored procedure. Before implementing checksum, i want to know what are the disadvantages of checksum in sql query  (sql 2008/2012).

Could you please tell me the disadvantages/drawback of checksum in sql?

checksum in sql (ms sql server query)

Databases are organized collections of data, most commonly accessed through management systems including schemas, tables, queries and processes that allow users to enter and manipulate the information or utilize it in other fashions, such as with web applications or for reporting purposes.

Databases

Microsoft SQL Server 2008 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. Major improvements include the  Always On technologies and support for unstructured data types.

Microsoft SQL Server 2008

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.