Twinkles questions

Twinkles answers

• sql server : select rows who's sum matches a value [duplicate]
• Rounding a datetime value down to the nearest half hour
• Replace multiple characters from string without using any nested replace functions
• How can I check if the values were changed after an update?
• Leaderboard design using SQL Server
• Are there performance/other downsides in creating a new RJDBC connections to MS SQL database for each request?
• Digitally signing an SQL Server database record or an insert/update operation
• how to get data of current week only in SQL server?