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Tag: mysql

Query to get IDs related to certain foreign keys but not others

I have two sites with separate Wordpress instances. One is in the process of getting WooCommerce, the other has existing users with set groups to access courses. I the future access to the courses is supposed to be sold via the shop. The answer I’m looking for has nothing to do with Wordpress per se but with SQL. Most of

Unable to query null in datetime column in mysql

select query There are are many entries having NUll as ShippedDate, one of them can be seen in the photo, but when i search for those entries where ShippedDate is NULL is get a empty set. How do i select all having NULL as ShippedDate Answer You use wrong operator, equal not work with null

Query to filter duplicate rows for particular column values

I have below table with given values:- Need query to filter Below ResultSet: I need a single row for a given Parent_code. If there are multiple Parent_code, then I have to look for highest Course_Version, if even Course_version’s are same, then I have to look for course_locale=’en_US’ only. And if even course_locale are same, then lastly I have to check

Data Type for Lists

I’m creating a table and one of the requirements is that the only option that can be entered are QLD, NSW, VIC, SA, WA, NT and ACT (Australian states). What is this datatype and how is written in SQL, …

Avoiding redundancy in database tables sql mysql

I have a question please. I am developing an online mall website. I have an orders table.. I have put the product_id as an attribute in order to know which product is ordered. In the customer’s purchase history page, I need to present all the orders purchased by the customer, including the product title and product image which are not

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