How to add a value from textBox over an existing certain
column in SQL Server
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Answer / Rupesh Kumar Paswan
To update an existing row in a table with a value from a textbox, use the UPDATE statement along with the SET keyword. Here's an example for updating the 'ColumnName' column of a specific row where 'PrimaryKey' is the primary key:
UPDATE TableName
SET ColumnName = @TextboxValue
WHERE PrimaryKey = @SpecificRowID
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