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I need update query where I can increment value by 1
Edit: Correct answer has been marked. I hope it will help some needy
UPDATE <tablename> SET <fieldname>=<fieldname>+<additional-value> WHERE ...
a query to add a value to a column:
update table
set column=column + your_value
where some_conditions
This is what you want?
Related
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How should I delete those two rows by using user_email and note_name only?
Please help
thank you
You can use this below delete script-
delete from your_table_name where user_email = 'asdf#....' and note_name = 'adsf'
Note: This will also delete other rows if there any matching for the conditions.
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I have value in a column of table like-
3,2,null,4,-1,-4,-2.
I want result like
4,3,2,null,-1,-2,-4.
You want NULL treated as a zero:
order by coalesce(column, 0) desc
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I have millions of data in my database table customer. In that, I have the id_token attribute which has value like cus00001 format now I want to change it to ank00001.
What will be the query in rails or mysql to do it for all the data in the database?
You can use simple update query using REPLACE function:
UPDATE `table_name` SET `id_token` = REPLACE(`id_token`, 'ank', 'cus');
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I'd have to make a SELECT ordering by first a column and then by another column... Is it possibile?
SELECT * FROM table_name ORDER BY colum1, column2
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is it possible to make in phpmyadmin table which will have:
"id, text1, text2, date"
And after "date" it will delete this record automatically?
You can use MySQL Event like this,
mysqli_query("SET GLOBAL event_scheduler = 'ON'");
mysqli_query("CREATE EVENT rec ON DATE() DO DELETE FROM table_name WHERE some_column=some_value;");