sql - Joining to tables while linking with a crosswalk table -

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i trying write query de identify 1 of tables. make distinct ids people, used name, age , sex. in main table, data has been collected years , sex code changed 1 meaning male , 2 meaning female m meaning male , f meaning female. make uniform in distinct individuals table used crosswalk table convert sexcode correct format before placing distinct patients table.

i trying write query match distinct patient ids correct rows main. table. issue sexcode has been changed. know use update statement on main table , changes of 1 , 2 m , f. however, wondering if there way match old new sexcodes not have make update. did not know if there way join main , distinct ids tables in query while using sexcode table convert sexcodes again. below example tables using.

this main table want de identify

----------------------------   | name | age | sex |  toy  | ----------------------------  | stacy| 30  | 1   | bat   | | sue  | 21  | 2   | ball  | | jim  | 25  | 1   | ball  | | stacy| 30  | m   | ball  | | sue  | 21  | f   | glove | | stacy| 18  | f   | glove | ----------------------------

sex code crosswalk table 

-------------------   | sexold | sexnew |   -------------------   |  m     |   m    |  |  f     |   f    |  |  1     |   m    |   |  2     |   f    |   -------------------

this table used to populate ids people found distinct in main table

--------------------------   | id | name | age |  sex |   --------------------------   |  1 | stacy| 30  |  m   |   |  2 | jim  | 25  |  m   |   |  3 | stacy| 18  |  f   |    |  4 | sue  | 21  |  f   |   --------------------------

this want de identified table like

---------------  | id  |  toy  | --------------- | 1   | bat   | | 4   | ball  | | 2   | ball  | | 1   | ball  | | 4   | glove | | 3   | glove | --------------- 

select c.id, a.toy maintable left join sexcodecrosswalk b on b.sexold = a.sex left join peopleids c on c.name = a.name , c.age = a.age , c.sex = b.sexnew

here's demonstration works: http://sqlfiddle.com/#!3/a2d26/1


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