This basically is a pivot table. A nice tutorial on how to achieve this can be found here: http://www.artfulsoftware.com/infotree/qrytip.php?id=78 I advise reading this post and adapt this solution to your needs. Update After the link above is currently not available any longer I feel obliged to provide some additional information for all of you searching for mysql pivot … Read more
Just as the error says, the CREATE VIEW statement needs to be the only statement in the query batch. You have two option in this scenario, depending on the functionality you want to achieve: Place the CREATE VIEW query at the beginningCREATE VIEW showing as select tradename, unitprice, GenericFlag from Medicine; with ExpAndCheapMedicine(MostMoney, MinMoney) as ( select max(unitprice), min(unitprice) … Read more
Possibly a security precaution. You could try adding a new administrator account: Although as Pascal and others have noted it’s not a great idea to have a user with this kind of access open to any IP. If you need an administrative user, use root, and leave it on localhost. For any other action specify … Read more
Composite indexes work just like regular indexes, except they have multi-values keys. If you define an index on the fields (a,b,c) , the records are sorted first on a, then b, then c. Example:
Right click the database itself, Tasks -> Generate Scripts… Then follow the wizard. For SSMS2008+, if you want to also export the data, on the “Set Scripting Options” step, select the “Advanced” button and change “Types of data to script” from “Schema Only” to “Data Only” or “Schema and Data”.
The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE. However in some systems locking is a side effect of concurrency control, and you achieve the same results without specifying FOR UPDATE explicitly. To solve this problem, Thread … Read more
I had a struggle getting this to work i’ve tested it and it’s working on lamp server mysql version 5.12 So, steps to success: sudo vim /etc/mysql/conf.d/mysql.cnf Scroll to the bottom of file Copy and paste[mysqld] sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION to the bottom of the file save and exit input mode sudo service mysql restart to restart MySQL. Done!
This is a mix of HTML and code but it’s pretty basic, easy to understand and should be fairly simple to decouple to suit your needs I think.
I found the generated set of drop statements useful, and recommend these tweaks: Limit the generated drops to your database like this: Note 1: This does not execute the DROP statements, it just gives you a list of them. You will need to cut and paste the output into your SQL engine to execute them. Note … Read more
This is usually caused by duplicates in the query specified in USING clause. This probably means that TABLE_A is a parent table and the same ROWID is returned several times. You could quickly solve the problem by using a DISTINCT in your query (in fact, if ‘Y’ is a constant value you don’t even need … Read more