Question

here’s my sample sql code

SELECT * FROM wsrecruitcvhead AS CV, wsrecruittimes AS WT 
WHERE
CV.`ResumeTitle` LIKE '%search%'
OR ResumeSummaryIntroduction LIKE '%search%'
OR WT.`AvailableToWorkSunday` = 0 
OR WT.`AvailableToWorkMonday` = 0
OR WT.`AvailableToWorkTuesday` = 0 
OR WT.`AvailableToWorkWednesday` = 0 
OR WT.`AvailableToWorkThursday` = 0
OR WT.`AvailableToWorkFriday` = 0  
AND CV.`ResumeID` = WT.`ResumeID` 
ORDER BY CV.ResumeID ASC;

am getting duplicate rows of data…it didn’t help when i tried SELECT DISTINCT * , what to do with this ?, how to solve it ?

Answer 1

You query is equivalent to:

SELECT *
  FROM wsrecruitcvhead AS CV, wsrecruittimes AS WT
 WHERE CV.`ResumeTitle` LIKE '%search%'
    OR ResumeSummaryIntroduction LIKE '%search%'
    OR WT.`AvailableToWorkSunday` = 0
    OR WT.`AvailableToWorkMonday` = 0
    OR WT.`AvailableToWorkTuesday` = 0
    OR WT.`AvailableToWorkWednesday` = 0
    OR WT.`AvailableToWorkThursday` = 0
    OR (WT.`AvailableToWorkFriday` = 0
        AND CV.`ResumeID` = WT.`ResumeID`)
 ORDER BY CV.ResumeID ASC;

This means you don’t have a good join between the two tables. Learn to use the explicit join notation to save yourself this grief:

SELECT *
  FROM wsrecruitcvhead AS CV
  JOIN wsrecruittimes AS WT
    ON CV.`ResumeID` = WT.`ResumeID`
 WHERE CV.`ResumeTitle` LIKE '%search%'
    OR ResumeSummaryIntroduction LIKE '%search%'
    OR WT.`AvailableToWorkSunday` = 0
    OR WT.`AvailableToWorkMonday` = 0
    OR WT.`AvailableToWorkTuesday` = 0
    OR WT.`AvailableToWorkWednesday` = 0
    OR WT.`AvailableToWorkThursday` = 0
    OR WT.`AvailableToWorkFriday` = 0
 ORDER BY CV.ResumeID ASC;

However, although this is a simple and direct modification of your query, you probably had in mind:

SELECT *
  FROM wsrecruitcvhead AS CV
  JOIN wsrecruittimes AS WT
    ON CV.`ResumeID` = WT.`ResumeID`
 WHERE (CV.`ResumeTitle` LIKE '%search%'
        OR ResumeSummaryIntroduction LIKE '%search%'
       )
   AND (   WT.`AvailableToWorkSunday`    = 0
        OR WT.`AvailableToWorkMonday`    = 0
        OR WT.`AvailableToWorkTuesday`   = 0
        OR WT.`AvailableToWorkWednesday` = 0
        OR WT.`AvailableToWorkThursday`  = 0
        OR WT.`AvailableToWorkFriday`    = 0
       )
 ORDER BY CV.ResumeID ASC;

Or even (since there’s no obvious reason to omit Saturday):

SELECT *
  FROM wsrecruitcvhead AS CV
  JOIN wsrecruittimes AS WT
    ON CV.`ResumeID` = WT.`ResumeID`
 WHERE (CV.`ResumeTitle` LIKE '%search%'
        OR ResumeSummaryIntroduction LIKE '%search%'
       )
   AND (   WT.`AvailableToWorkSunday`    = 0
        OR WT.`AvailableToWorkMonday`    = 0
        OR WT.`AvailableToWorkTuesday`   = 0
        OR WT.`AvailableToWorkWednesday` = 0
        OR WT.`AvailableToWorkThursday`  = 0
        OR WT.`AvailableToWorkFriday`    = 0
        OR WT.`AvailableToWorkSaturday`  = 0
       )
 ORDER BY CV.ResumeID ASC;