Update multiple query in mysql
I am trying to understand how to UPDATE multiple rows with different values and I just don't get it. The solution is everywhere but to me it looks difficult to understand. Show For instance, three updates into 1 query:
I read an example, but I really don't understand how to make the query. i.e:
I'm not entirely clear how to do the query if there are multiple condition in the WHERE and in the IF condition..any ideas?
SuperStormer 4,7495 gold badges20 silver badges32 bronze badges asked Sep 4, 2014 at 20:48
fran.sand66fran.sand66 10.2k19 gold badges57 silver badges100 bronze badges 1
You can do it this way:
I don't understand your date format. Dates should be stored in the database using native date and time types. answered Sep 4, 2014 at 20:53
Gordon LinoffGordon Linoff 1.2m53 gold badges596 silver badges739 bronze badges 15 MySQL allows a more readable way to combine multiple updates into a single query. This seems to better fit the scenario you describe, is much easier to read, and avoids those difficult-to-untangle multiple conditions.
This assumes that the However, this approach makes prepared statements easier to build and more concise.
John 11.9k11 gold badges90 silver badges156 bronze badges answered Jan 19, 2016 at 0:13
18 You can use a
answered Sep 4, 2014 at 20:54
Hart COHart CO 33.3k5 gold badges44 silver badges60 bronze badges 1
Saghachi 7199 silver badges16 bronze badges answered Dec 11, 2016 at 7:43
Akshay BhanAkshay Bhan 1952 silver badges12 bronze badges To Extend on @Trevedhek answer, In case the update has to be done with non-unique keys, 4 queries will be need NOTE: This is not transaction-safe This can be done using a temp table. Step 1: Create a temp table keys and the columns you want to update
Step 2: Insert the values into the temp table Step 3: Update the original table
Step 4: Drop the temp table
answered Mar 30, 2020 at 11:45
SabSab 4705 silver badges16 bronze badges In php, you use
comparing result to transaction, insert, case methods in update 30,000 raw. Transaction: 5.5194580554962 As you can see, multiple statements query is more efficient than the highest answer. Just in case if you get error message like this:
You may need to increase the answered Dec 19, 2021 at 7:50
SaghachiSaghachi 7199 silver badges16 bronze badges
Here col4 & col1 are in Table1. col2 & col3 are in Table2
answered Apr 23, 2020 at 4:25
ankit giriankit giri 3083 silver badges9 bronze badges I did it this way:
where PushSettings is
it works fine answered Apr 16, 2020 at 13:30
ru51anru51an 1151 gold badge1 silver badge10 bronze badges 1 How UPDATE multiple columns with different values in SQL?To update multiple columns use the SET clause to specify additional columns. Just like with the single columns you specify a column and its new value, then another set of column and values. In this case each column is separated with a column.
Can we UPDATE multiple rows in a single UPDATE statement?Column values on multiple rows can be updated in a single UPDATE statement if the condition specified in WHERE clause matches multiple rows. In this case, the SET clause will be applied to all the matched rows.
How do you UPDATE multiple statements in SQL?The UPDATE statement in SQL is used to update the data of an existing table in database. We can update single columns as well as multiple columns using UPDATE statement as per our requirement. UPDATE table_name SET column1 = value1, column2 = value2,...
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