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23 cze 2013 · I am trying to UPDATE values from a table, but I need to add some conditions. I found the function CASE, but I am not if it is the best method. Here is an example.
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.
[WHERE . condition]; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the table that you want to update data after the UPDATE keyword. Second, specify which column you want to update and the new value in the SET clause.
16 kwi 2016 · For this example, you would have to use the standard logical operators: UPDATE Tests SET TestScore = CASE WHEN (TestId = 10 AND TestSubId = 25) THEN 1000 WHEN (TestId = 11 AND TestSubId = 22) THEN 1100 END, TestScore2 = CASE WHEN (TestId = 10 AND TestSubId = 25) THEN 2000 WHEN (TestId = 11 AND TestSubId = 22) THEN 2100 END WHERE (TestId = 10 ...
9 cze 2023 · In some database vendors (SQL Server, MySQL, PostgreSQL), you are able to use a JOIN in an UPDATE statement to update data using values in another table. UPDATE table1 SET table1.column = table2.column FROM table1 INNER JOIN table2 ON table1.column2 = table2.column2 [WHERE condition];
26 kwi 2020 · The UPDATE statement can be used to update a single column, a larger set of records (through the use of conditions), and/or the entire table in a database. The condition(s) can be a boolean, a string check, or mathematical sequence that resolves to a boolean (greater than, less than, etc.).
26 cze 2024 · Updating table rows using subqueries in MySQL enables precise modifications based on specific conditions or values from other tables. This technique leverages subqueries within the SET or WHERE clauses of the UPDATE statement, allowing dynamic and context-specific updates.
