mysql - Left/Right Join with reference to another table -

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I'm trying to reach three tables to do something like this: 

 < Code> + - ----- + ------ + ------ + | Items | PCS | CSS | + ------ + ------ + ------ + | 10 99 | 2 | 11 | | 10 9 8. 2 | 2 | | 10 9 7. 2 | 1 | | 10 9 6. Faucet Faucet | 10 9 5. Faucet Faucet | 10 9 4. Faucet Faucet | 10 9 3. Faucet Faucet | 10 9 2. Faucet Faucet + ------ + ------ + ------ +   
 But, I get all this:  
  + ------ + ------ + ------ + | Items | PCS | CSS | + ------ + ------ + ------ + | 10 99 | 2 | 11 | | 10 9 8. 2 | 2 | | 10 9 7. 2 | 1 | + ------ + ------ + ------ +   
 // I'm confused with my query, so here's a breakdown Instead of what I am trying to do:  
  SET2 WHERE MO = MONTH (SYSDATE ()) and YR = YEAR (SYSDATE ()) // Select the code and then: SELECT ITEM , Select items from SET3 WHERE S3.CODE = S2.CODE // again: SET1 WHERE S1 by PCS, CSS. ITEM = S3.ITEM   
 My table  
 SET1  
  + ------ + | Items | + ------ + | 10 99 | | 10 9 8. | 10 9 7. | 10 9 6. | 10 9 5. | 10 9 4. | 10 9 3. | 10 9 2. + ------ +   
 SET2  
  + ------ + ----- + ------ + | Yar | MO | Code | + ------ + ----- + ------ + | 2013 | 1 | 1 | | 2013 | 2 | 2 | + ------ + ----- + ------ +   
 SET3  
  + ------ + ----- + ------ + ------ + | PCS | CSS | Code | Items | + ------ + ----- + ------ + ------ + | 2 | 11 | 1 | 10 99 | | 2 | 2 | 1 | 10 9 8. | 2 | 1 | 1 | 10 9 7. + ------ + ----- + ------ + ------ +    
 
 
 You must use left join to work:  
  Select SELECT1. Connect the CSS, SET3 on SET3, excluding ITEM, PCS, SET1. ITEM = SET1.ITEM SET2.CODE = SET3 .CODE and SET2.MO = MONTH (SYSDATE ()) and SET2.YR = YEAR (SYSDATE ())

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