A CASE expression returns a value from the THEN portion of the clause. You could use it thusly: SELECT * FROM sys.indexes i JOIN sys.partitions p ON i.index_id = p.index_id JOIN sys.allocation_units a ON CASE WHEN a.type IN (1, 3) AND a.container_id = p.hobt_id THEN 1 WHEN a.type IN (2) AND a.container_id = p.partition_id THEN … Read more
Python 3.10 and above In Python 3.10, they introduced the pattern matching. Example from the Python documentation: def http_error(status): match status: case 400: return “Bad request” case 404: return “Not found” case 418: return “I’m a teapot” case _: return “Something’s wrong with the internet” Before Python 3.10 While the official documentation are happy not … Read more
How do I perform an IF…THEN in an SQL SELECT?
Install the additional module tablefunc once per database, which provides the function crosstab(). Since Postgres 9.1 you can use CREATE EXTENSION for that: CREATE EXTENSION IF NOT EXISTS tablefunc; Improved test case CREATE TABLE tbl ( section text , status text , ct integer — “count” is a reserved word in standard SQL ); INSERT … Read more
Either use single quotes, like q = “select tbuc.csId, tbuc.uId, tbuc.cId, tbui.role_type, tbuc.time as login_date” + “, tbuc.sessId, (case when tbui.role_type=”ROLE_USER” then 1 else 0 end) ” + “as assignment_submitted FROM tb_user_click tbuc, tb_user_info tbui WHERE ” + “tbui.user_id = tbuc.uId and tbuc.csId = tbui.class_section_id;” Or escape the double quotes, like q = “select tbuc.csId, … Read more
I am not sure that I get it correctly, but you may try Random rnd = new Random(); int caseSwitch = rnd.Next(1, 13);
This usage of comma in case label is illegal in standard C++. It is simply grammatically incorrect. A conforming compiler must issue a diagnostic message in response to this code, even if it accepts it somehow. There might (or might not) be some intricate details involved. In the original C++98 language comma operator was prohibited … Read more