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How to bind variable in string in SQL query?

I am using SQL Developer. When I want to bind value. Normally I use following syntax: but, I don’t know how to do that in string. The following query does not work. Why do I need it? Because my program runs a query in python and assigns something to bind variable: Answer Concatenate the prefix/suffix with the bind variable:

date time comparison with > does not work

I have two SQL statements: 1) (now i use this) 2) (but i need to use this) first query return 11 lines query 2 return 388. my observation (about query 2) is that instead of “2019-11-26 13:20:00” it is taken “2019-11-26” and when I replace it really returns the same answer date_occured is of type of timestamp without time zone

Count double occurrences in order list

I have a list of orders, I need to find which ones occur with code 47 more than once with different users. For example: The expected result is 111 and 333. How can I accomplish this? Regards Answer I think you want aggregation and having: You can also express the having as:

How to identity customer orders by customer IDs [closed]

Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question Say for example I have table Customer and I have another table called orders. How to identify that each order belongs to that particular customer.

MYSQL Query calculate percentage of emails not null

I have these two queries. Caluculates count of emails that are null SELECT COUNT(*) as invalid_email FROM distinct_customers WHERE c_email IS NULL; Calculates count of every email SELECT COUNT(distinct c_number) as total FROM distinct_customers; I am trying to combine those to queries so that it gives me a percentage of valid emails (not null) I tried a couple of ways