error in the if exits statement in my sql

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can any one help me in solving my problem!

I am using if exits statement to check weather user name , date of birth etc present in the data base or not but i am get the following error

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF EXISTS (select NAME,SUR_NAME,DATE_OF_BIRTH,POST_CODE where NAME='$Name',SUR_N' at line 1

here is my code:

$sql="IF EXISTS (select NAME,SUR_NAME,DATE_OF_BIRTH,POST_CODE where NAME='$Name',SUR_NAME='$SurName',DATE_OF_BIRTH='$Month-$Day-$Year',POST_CODE='$postcode') 
INSERT INTO `user_details`(`REGISTRATION_NUM`, `POST_CODE`, `NAME`, `SUR_NAME`, `FATHER/SPOUSE_NAME`,
 `GENDER`, `DATE_OF_BIRTH`, `QUALIFICATION`, `C_DESIGNATION`, `CONTACT_ADDRESS`, `PERMANENT_ADDRESS`, `CONTACT_NUM`, `ALTERNATE_NUM`, `P_EMAIL`, `ALTERNATE_EMAIL`, `DD_NUM`, `DD_DATE`, `BRANCH/BANK`, `RECENT_PROFILE`, `OBJECTIVE`,
 `ADD_DUTIES`, `ACHIEVEMENTS`, `EXTRA_CIRRICULAR_ACT`, `LANGUAGES`, `INTERESTS_HOBBIES`, `PURPOSE`, `ESSAY`,   `RefName1`, `RefDesgnation1`, `RefAddress1`,
 `RefContactNum1`, `RefBoard1`, `RefName2`, `RefDesignation2`, `RefAddress2`,
 `RefContactNum2`, `RefBoard2`) 
VALUES
 (NULL, '$postcode', '$Name', '$SurName', '$Father_SpouseName',
 '$Gender', '$Month-$Day-$Year', '$Qualification',
 '$CurrentDesignation', '$ConctactAddress', '$PermanentAddress', '$ContactNo', '$AlternativeNo', '$Primary_Email_Id', '$Alternative_Email_Id', '$DDNo', '$DD_Date', '$BankAndBranch',
  '$RecentProfile', '$Objective', '$AdditionalDuties', '$Achievements', '$ExtraCirriculars', '$Languages', '$HobiesInterests', '$Purpose', '$Essay',  '$RefName1', '$RefDesignation1', '$RefAddress1', '$RefContactNo1', '$RefBoard1', '$RefName2', '$RefDesignation2', '$RefAddress2','$RefContactNo2','$RefBoard2')";

Posted 14-Mar-11 19:04pm

Rajesh Yerramsetti

Updated 14-Mar-11 19:36pm

Baji Jabbar

v3

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BSRK · Answer 1 · 2011-03-15T00:11:00

1. you may use 'and' in between your various 'where' conditions instead of 'comma (,)'
2. doubt: if so & so data already exists, why to insert once again. better use 'if not exists'.
3. instead of checking various fields "select NAME,SUR_NAME,etc....", use "select top 1 'x'....". this will improve sql performance as well.
4. last suggestion: check for primary keys.