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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.
My table has 5 columns, and I am trying to perform a conditional query based on a value in column_5. I need to modify this query according to the following: If column_5 > 0 , then I don't want to include the values from column_1 in my sum, Total .
10 paź 2023 · When you combine the SUM function with the IF function, you can perform conditional summation, making it a powerful tool for data analysis. Here’s the basic syntax of the SUM IF: SELECT SUM (IF (condition, value_to_sum, 0)) FROM table_name; Code language: SQL (Structured Query Language) (sql) In this syntax: condition: The condition that you ...
In this article, we would like to show you UPDATE query with IF condition in MySQL. Quick solution: UPDATE `table_name` SET `column_name` = IF(condition , if_true, if_false); Practical example. To show UPDATE query with IF condition, we will use the following users table:
16 kwi 2016 · In MySQL, you can use tuple comparison: WHERE (TestId, TestSubId) IN ((10,25), (11,22)) That looks nice and succinct, although, as ypercubeᵀᴹ mentioned in a comment, it may not work well performance-wise.
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.
29 lis 2017 · I was trying to use the query below to update the ORDERS table by making the O_TOTALPRICE column up-to-date when the LINEITEM table is modified. And I was using a standard TPC-H database. UPDATE ORDERS O, LINEITEM L. SET. O.O_TOTALPRICE = SUM(L.L_EXTENDEDPRICE * (1 - L.L_DISCOUNT/100) * (1 + L.L_TAX/100)) WHERE.
