SQL - UNION QUERY REVIEW COMMAND

Hello,

I am trying to join two tables and I am not sure if I wrote the command right.

  SELECT "PRT_CURRENT__TIME"."Period_End_Date", "PRT_CURRENT__TIME"."Units", "PRT_CURRENT__TIME"."Pay_ID", "PRT_CURRENT__TIME"."Job", "JCM_MASTER__JOB"."Description", "PRT_CURRENT__TIME"."Amount", "PRT_CURRENT__TIME"."Employer_Taxes", "PRT_CURRENT__TIME"."Fringes", "PRT_CURRENT__TIME"."Cash_Fringes", "PRM_MASTER__EMPLOYEE"."Employee_Name", "JCM_MASTER__JOB"."Cost_Account_Prefix"
FROM   ("\\TEST\Timberline Data\TEST\"."PRT_CURRENT__TIME" "PRT_CURRENT__TIME" INNER JOIN "\\TEST\Timberline Data\TEST\"."JCM_MASTER__JOB" "JCM_MASTER__JOB" ON "PRT_CURRENT__TIME"."Job"="JCM_MASTER__JOB"."Job") INNER JOIN "\\TEST\Timberline Data\TEST\"."PRM_MASTER__EMPLOYEE" "PRM_MASTER__EMPLOYEE" ON "PRT_CURRENT__TIME"."Employee"="PRM_MASTER__EMPLOYEE"."Employee"
WHERE  "PRT_CURRENT__TIME"."Period_End_Date">={d '2019-12-12'} AND "JCM_MASTER__JOB"."Cost_Account_Prefix"='20'
ORDER BY "JCM_MASTER__JOB"."Cost_Account_Prefix", "PRT_CURRENT__TIME"."Job", "PRM_MASTER__EMPLOYEE"."Employee_Name"
 UNION
 SELECT "PRT_EXECCURENT__TIME"."Period_End_Date", "PRT_EXECCURENT__TIME"."Units", "PRT_EXECCURENT__TIME"."Pay_ID", "PRT_EXECCURENT__TIME"."Job", "JCM_EXECMASTER__JOB"."Description", "PRT_EXECCURENT__TIME"."Amount", "PRT_EXECCURENT__TIME"."Employer_Taxes", "PRT_EXECCURENT__TIME"."Fringes", "PRT_EXECCURENT__TIME"."Cash_Fringes", "PRM_EXECMASTER__EMPLOYEE"."Employee_Name", "JCM_EXECMASTER__JOB"."Cost_Account_Prefix"
 FROM   ("\\TEST\Timberline Data\TEST\"."PRT_EXECCURENT__TIME" "PRT_EXECCURENT__TIME" INNER JOIN "\\TEST\Timberline Data\TEST\"."JCM_EXECMASTER__JOB" "JCM_EXECMASTER__JOB" ON "PRT_EXECCURENT__TIME"."Job"="JCM_EXECMASTER__JOB"."Job") INNER JOIN "\\TEST\Timberline Data\TEST\"."PRM_EXECMASTER__EMPLOYEE" "PRM_EXECMASTER__EMPLOYEE" ON "PRT_EXECCURENT__TIME"."Employee"="PRM_EXECMASTER__EMPLOYEE"."Employee"
WHERE  "PRT_EXECCURENT__TIME"."Period_End_Date">={d '2019-12-12'} AND "JCM_EXECMASTER__JOB"."Cost_Account_Prefix"='20'
ORDER BY "JCM_EXECMASTER__JOB"."Cost_Account_Prefix", "PRT_EXECCURENT__TIME"."Job", "PRM_EXECMASTER__EMPLOYEE"."Employee_Name"