Hope this isn’t too hard to explain. I need to update the first table with addresses from the second So basically I have mytable1 that has the following columns: id (pkey) | super_id | address …
Tag: sql-update
How can I update the table in SQL?
I’ve created a table called Youtuber, the code is below: In this table, there are 2 channels: So, I want to edit the age of “Grandtour Games” to “18”. How can I do that with update? Is my code right? Answer No, in update, you’ll have to follow this sequence: In your code, put this: Comments below:
How to set to NULL a datetime with 0000-00-00 00:00:00 value?
I need to change a few values on my DB. I forgot to set nullable to the table and it set to 0000-00-00 00:00:00 by default. Now I need to convert that value in NULL. The field type is Datetime. How can I do it? I try with the typical Update table set field = NULL WHERE field = ‘0000-00-00
UPDATE mysql rows
I’m trying to update a lot (close to 500) of rows in mysql database. How can I make it with just 1 query? …and it goes on and on until 500. Answer Use the BETWEEN operator: If not all products with an ID in that range should be updated, you’ll have to use the IN operator and construct the query
Storing ‘Rank’ for Contests in Postgres
I’m trying to determine if there a “low cost” optimization for the following query. We’ve implemented a system whereby ‘tickets’ earn ‘points’ and thus can be ranked. In order to support analytical type of queries, we store the rank of every ticket (tickets can be tied) with the ticket. I’ve found that, at scale, updating this rank is very slow.
Update row with select on same table
I’m trying to update row with same table query. Context: I want to : For each row; if TEXT IS NULL; update it with TEXT value of row with same ID and LANG = ‘EN’. What is the SQL request to do something like that ? Answer You don’t specify the database. The following is standard SQL: In the event
How to use CTE’s with update/delete on SQLite?
SQLite now has CTEs, and the documentation says you can use it with insert, update and delete queries — but only gives examples of select statements. I can figure out how CTEs apply to inserts, via insert-select; but how can we use them in update or delete, where there is no from-clause? Answer CTEs can be used in subqueries:
How can I update date of datetime field with mysql only?
I have a table like this I want to update only the date but dont know where to start from. I mean in the datetime field date i want to update the date ‘2014-01-08’ to ‘2014-01-01’. How can i do that? I have tried this. Here is the Fiddle Structure Answer One option is to use this: Fiddle: http://sqlfiddle.com/#!2/28d71/1 For
Performing an UPDATE with Union in SQL
If I were to have these three tables (just an example in order to learn UNION, these are not real tables): Tables with their columns: And I wanted to update order_status in the Customer table when there is a order filled in either the Order_Web table or the Order table for that customer using Union: How can I combine these
Conditional UPDATE in MySQL
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 is ‘relation’: userid1 | userid2 | name1 | name2 I got for example: Output: 4 | 3 | bill | jack and I