I have a table foo that looks like this: +———-+————–+——+—–+——————-+—————-+ | Field | Type | Null | Key | Default | Extra | +–…
Presto – hex string to int
I’m trying to convert hex string (starts with ‘0x’) to it’s integer value using presto. For example 0x100 to 256. My hex string is called msg_id. I tried to use this- But I run into a problem, because from_hex expect even number of hex digits (0100 instead of 100). I decided to try and…
SQL If Not Any From Left Join Else Left Join
I the following query and I only want the results from the first left join that returns results for the addresses (add1/2/3). Is it possible, or should I just return it all and filer the results later? For example, if add1 returns 1 address, add2 returns 1 address and add3 returns 3 addresses, I only want the…
Correct use of Try Catch for the SQL connection in C#
Is this code correct in means of Try/Catch? I need to value whether the action is done or not to inform the user about the result, so I will then get the bool value to know if connection was successful. Answer Your method can actually have 3 outcomes: The table was created successfully (method returns true) T…
MySQL 8 create new user with password not working
I am using MySQL for several years and the command for the creating the new user till the MySQL 5.x version is as follow: Recently I installed the MySQL 8. In that, this command is not working. It is throwing following error while firing above command: Is there any change of syntax in MySQL 8? What is the cor…
Return default rows from a function when first SELECT does not return rows
I have this function http://rextester.com/VIHMIG61446 and I’m looking a way to not repeat the whole query on the if, so I decided to use with as to store the result but it does not work for me http://rextester.com/MVMVA73088 How should I use with as? Answer The if-else logic can be avoided completely. T…
How to set the username and password for the admin using database table?
I have created a website with login form for the administrator. I have the admin table in my database. I added the values in the table but when I try to login, the password is not being accepted. My …
Count number of orders for a variation in Woocommerce
I have figured a way to do this, but I am finding my queries are taking way too long, and the more orders in Woocmmerce, and the more variations we add, the longer the query takes… I would hope there is a way in WC or WP to query just variation ids of an order, but alas, I havent found
ERROR 1054 (42S22): Unknown column ” in ‘where clause’
The MySQL query got following error. ERROR 1054 (42S22): Unknown column ‘scope.full_name’ in ‘where clause’ Here are two tables as below. 1.scope: +———–+———-+————-+———…
Teradata Dynamic SQL with Bind Variables?
Is it possible to use bind variables in a Teradata dynamic SQL statement? I can’t find an example anywhere. I’m looking to do something like this: DECLARE SQLString VARCHAR(1000) SET SQLString = ‘…