Question

I have a column: account_type which contains four characters. d, h, v, a. Now, if the account_type is d then it should display DBA, if a then application, if v then vendor, and if h then human. I tried this query.

SELECT da.account_name, da.account_id,da.manager_lastname, da.manager_firstname, 
dap.live_password_change, dap.dev_password_change, das.status_desc, 
REPLACE(RTRIM(CONCAT(IF(da.account_type = 'd', 'DBAs', 'NO'))), ' ', ', ')
FROM dba_account da
LEFT JOIN dba_account_password dap ON da.account_id = dap.account_id
LEFT JOIN dba_account_status das ON da.status = das.status_id
WHERE CAST(da.account_name AS BINARY) RLIKE '[a-z]'
AND da.account_name NOT RLIKE '[#$\\\\////]'
ORDER BY da.account_name

But i dont know how to compare 4 conditions. Any suggestions please?

Answer 1

You would use CASE similar to this:

    SELECT da.account_name, da.account_id,da.manager_lastname, da.manager_firstname, 
dap.live_password_change, dap.dev_password_change, das.status_desc, 
CASE da.account_type 
    WHEN 'd' THEN 'DBAs'
    WHEN 'a' THEN 'application'
    WHEN 'v' THEN 'vendor'
    WHEN 'h' then 'human' 
    ELSE 'NO' END as 'account_type'
FROM dba_account da
LEFT JOIN dba_account_password dap ON da.account_id = dap.account_id
LEFT JOIN dba_account_status das ON da.status = das.status_id
WHERE CAST(da.account_name AS BINARY) RLIKE '[a-z]'
AND da.account_name NOT RLIKE '[#$\\\\////]'
ORDER BY da.account_name