第一种方式:使用mysql的存储过程,判断哪一个表的字段内容全是数字,放在前面。
第二种方式:使用java或其他动态语言,进行判断并组装。
另一种思路,就是把三个表的数据统一一下。
当然可以,就是在mysql存储过程中使用动态sql,就可以拼接sql,然后执行了。
给你复制一段,如果不满意,自己搜索 mysql 存储过程 动态sql 就可以了
DROP PROCEDURE IF EXISTS SearchByDoctorCREATE PROCEDURE SearchByDoctor(
IN DoctorId VARCHAR(50),
IN deptId VARCHAR(50),
IN beginDate VARCHAR(20),
IN endDate VARCHAR(20),
IN StandDeptId VARCHAR(50),
IN OperationFlag VARCHAR(50),
IN SsczflId VARCHAR(50),
OUT OperNum INT,
OUT AvgDangerIndex DOUBLE,
OUT OperGrCase INT
)
BEGIN
DECLARE cal1 VARCHAR(800)
DECLARE cal2 VARCHAR(800)
SET cal1="SELECT COUNT(1),AVG(DANGER_INDEX) INTO @para1,@para2 FROM yw_ssxxb WHERE 1=1 "
SET cal2="SELECT COUNT(1) INTO @para3 FROM gr_grbw WHERE OPE_RELID IN (SELECT RELID FROM yw_ssxxb WHERE 1=1"
#拼接医生id
SET cal1=CONCAT(cal1," ","AND OPEDOC_ID = ","'",DoctorId,"'")
SET cal2=CONCAT(cal2," ","AND OPEDOC_ID = ","'",DoctorId,"'")
#拼接科室id
IF deptId <>'' THEN
SET cal1=CONCAT(cal1,"AND DEPT_ID =","'",deptId,"'")
END IF
#拼接开始结束日期
IF beginDate<>'' AND endDate <>'' THEN
SET cal1=CONCAT(cal1," ","AND OPER_AT BETWEEN ","'",beginDate,"'"," AND ","'",endDate,"'")
END IF
#拼接标准科室
IF StandDeptId<>'' THEN
SET cal1=CONCAT(cal1," ","AND DEPT_ID IN ( SELECT ID FROM department WHERE STAND_DEPT_ID = ","'",StandDeptId,"'",")")
END IF
#拼接数据来源
IF OperationFlag <>'' THEN
SET cal1=CONCAT(cal1," ","AND OPEPARTKINDID IN (SELECT ID FROM zh_ssczfl WHERE FLAG= ","'",OperationFlag,"'",")")
END IF
#拼接手术 *** 作类别
IF SsczflId <> '' THEN
SET cal1=CONCAT(cal1," ","AND OPEPARTKINDID = ","'",SsczflId,"'")
END IF
SET cal2 =CONCAT(cal2,")")
SET @sql1=cal1
SET @sql2=cal2
PREPARE stmt1 FROM @sql1
EXECUTE stmt1
DEALLOCATE PREPARE stmt1
PREPARE stmt2 FROM @sql2
EXECUTE stmt2
DEALLOCATE PREPARE stmt2
SET OperNum=@para1
SET AvgDangerIndex=@para2
SET OperGrCase=@para3
END
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