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I'm looking for a way to update the values 'Test2' and 'Test' with the data from other rows in the 'VALUE' column with the same 'NAME' (The ID is not unique here, a composite key of the ID and NAME make a row unique). For example, the output I'm looking for is:
For the single-table syntax, the UPDATE statement updates columns of existing rows in the named table with new values. The SET clause indicates which columns to modify and the values they should be given.
21 maj 2012 · Method 3: Populate using an UPDATE statement. This case would occur when, for example, there was a value from another part of your application that needs to be added to the table, or you need to specify an exact order for the unique values. BEGIN TRANSACTION ALTER TABLE MyTable ADD MyColumn int NULL UPDATE MyTable SET MyColumn = ...
9 cze 2023 · MySQL: UPDATE tablename SET column1 = value1 [WHERE condition] [LIMIT rowcount]; Both the TOP keyword in SQL Server and the LIMIT keyword in MySQL are optional. SQL UPDATE Statement Examples. Let’s have a look at some examples of the SQL UPDATE statement. These examples apply to Oracle, SQL Server, MySQL, and PostgreSQL unless stated otherwise.
The SQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition; Note: Be careful when updating records in a table! Notice the WHERE clause in the UPDATE statement.
4 sty 2016 · In Oracle you could use a CASE as the other answers have: UPDATE TableName SET gender = CASE WHEN gender = 'M' THEN 'W' WHEN gender = 'W' THEN 'M' END WHERE gender in ('M','W'); You could also use a DECODE: UPDATE TableName SET gender = DECODE(gender,'M','W','W','M') WHERE gender in ('M','W');
This tutorial shows you how to use Oracle UPDATE statement to change existing values in a table. It also provides some practical examples of updating data.
