MySQL supports a multi-table UPDATE syntax, which would look approximately like this: You can update the Train table and delete from the Reservations table in the same transaction. As long as you do the update first and then do the delete second, it should work.
I am working with a query which contains “CASE” statement within “WHERE” clause. But SQL Server 2008 is giving some errors while executing it. Can anyone please help me with the correct query? Here is the query:
You are mixing implicit joins with explicit joins. That is allowed, but you need to be aware of how to do that properly. The thing is, explicit joins (the ones that are implemented using the JOIN keyword) take precedence over implicit ones (the ‘comma’ joins, where the join condition is specified in the WHERE clause). Here’s an outline of … Read more
I am getting the above error when trying to connect to a server database from a client using service name orcl. It is getting connected when I am using the other service name i.e. dms Below is my listener.ora Please tell me what to do?
have an already coded application in PHP/MySQL about school management. I am trying to further customize it as it is no longer serviced by the provider. I see /index.php?admin/admin_dashboard on the address bar but cannot find any file named admin_dashboard. Can anybody help about what it means? I am a novice programmer in PHP with practically no experience. actually, it … Read more
New versions of MySQL WorkBench have an option to change specific timeouts. For me it was under Edit → Preferences → SQL Editor → DBMS connection read time out (in seconds): 600 Changed the value to 6000. Also unchecked limit rows as putting a limit in every time I want to search the whole data … Read more
Solution 1: Remove ONLY_FULL_GROUP_BY from mysql console you can read more here Solution 2: Remove ONLY_FULL_GROUP_BY from phpmyadmin Open phpmyadmin & select localhost Click on menu Variables & scroll down for sql mode Click on edit button to change the values & remove ONLY_FULL_GROUP_BY & click on save.
You can simply add another join like this: However be aware that, because it is an INNER JOIN, if you have a message without an image, the entire row will be skipped. If this is a possibility, you may want to do a LEFT OUTER JOIN which will return all your dashboard messages and an image_filename only if … Read more
To copy with indexes and triggers do these 2 queries: To copy just structure and data use this one: I’ve asked this before: Copy a MySQL table including indexes
I would suggest using R and the package RSQLite