![sql checksum sql checksum](https://i.stack.imgur.com/fXPTV.png)
Create a test table to study collation sensitivity of CHECKSUMĬREATE TABLE #Binar圜hecksumCollationSensivityīinar圜hecksumInsensitive AS BINARY_CHECKSUM(CaseInsensitiveColumn),īinar圜hecksumSensitive AS BINARY_CHECKSUM(CaseSensitiveColumn) Therefore, let us recreate this scenario for BINARY_CHECKSUM and study the behaviour: If the data is the same, the checksum values should also be the same. If the same data is stored using two different collations, CHECKSUM would incorrectly flag them as being different. One of the main drawbacks in case of CHECKSUM is the fact that it is collation sensitive. BINARY_CHECKSUM is Collation In-sensitive IMPORTANT: BINARY_CHECKSUM is able to detect case changes in a case insensitive database. This is because the binary representation of "PARIS" and "paris" is different, resulting in the different BINARY_CHECKSUM value. GO Identifying record changes using BINARY_CHECKSUM - Case sensitivity IdĪs can be seen above highlighted in green, the BINARY_CHECKSUM computation for the updated record has been updated. see if the BINARY_CHECKSUM value changes
SQL CHECKSUM UPDATE
Now, let us update the value of CityName for one of the records such that the case of one of the values changes. The BINARY_CHECKSUM values for the rows currently available in the table are given below: BINARY_CHECKSUM is case-sensitive Id The tests are similar to those we performed for CHECKSUM in that we will be creating a temporary table with data columns and compute the BINARY_CHECKSUM over these.īinar圜heckSum AS BINARY_CHECKSUM(EmployeeName, CityName)
![sql checksum sql checksum](https://www.microsoftsqlexpert.com/images/CHECKSUM_AGG.jpg)
To prove that BINARY_CHECKSUM is sensitive to case changes, let’s perform the following test. Let us therefore test if BINARY_CHECKSUM can overcome the limitations of CHECKSUM: BINARY_CHECKSUM is case-sensitive
![sql checksum sql checksum](https://makolyte.com/wp-content/uploads/2020/11/cropped-get-filehash-in-powershell-to-generate-a-files-md5-checksum.png)
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