将select中的db2列名称转换为json文件中的小写

Question

I currently have a very simple select that my code then dumps into JSON

SELECT user, phone
FROM table t;

But the select returns all uppercase column names, resulting in uppercase JSON keys, which I don't want. Is there a way in DB2 to return lowercase column names?

Answer 1

If you want to get lowercase columns names (not data) in DB2, you must use double quotes around the column names.

SELECT user as "user", phone as "phone"
FROM table t;

Answer 2

If you want the result of the query to be small, try this

SELECT LOWER(user), LOWER(phone)
FROM table t;

Answer 3

Use the LOWER() function;

    SELECT LOWER(user) AS 'user', LOWER(phone) AS 'phone'
    FROM table t;