執行sql查詢時如何根據整數變量設置字符串值？

Question

SQL查詢

sessionFactory.getCurrentSession().createSQLQuery("select claim.encounterId, claim.claimUniqID, patientmaster.FirstName, tbl_insurance.insurance_name, claim.status from rcmdb.claim join rcmdb.encounter on claim.encounterID=encounter.encounterID join rcmdb.insurance_details on encounter.insuranceDetailsID=insurance_details.insuranceDetailsID 
join rcmdb.tbl_insurance on insurance_details.insurance=tbl_insurance.insurance_id 
join rcmdb.patientmaster onpatientmaster.patientMasterID=encounter.patientMasterID
where createdByDate between'"+from+"' and '"+to+"'").list();

我想根據 claim.status 值返回字符串值，例如如果狀態為 1 接受，在輸出中我想要字符串值我該如何編寫查詢？

Answer 1

您可以使用 CASE 語句。 https://www.w3schools.com/sql/func_mysql_case.asp

SELECT CASE
    WHEN status =1 THEN STRING
    ELSE NULL
END

Answer 2

在數據庫中放置一個表，將 int 映射到字符串並加入它：

ClaimStatus
--------------
ID, StatusDescription
1, Accepted
2, Rejected

SELECT c.PolicyNumber, c.ClaimValue, cs.StatusDescription
FROM
  claims c
  INNER JOIN claimstatus cs ON c.ClaimStatusId = cs.ID