SQL JOIN anOTHER JOIN code example

Example 1: only join in sql

They are functionally equivalent, but INNER JOIN can be 
a bit clearer to read, especially if the query has 
other join types (i.e. LEFT or RIGHT or CROSS) 
included in it.

Example 2: Join In Sql Server

CREATE PROCEDURE SP_Purechase_Selecte

AS

SELECT
p.P_Id ,
p.p_name,
p.alias_name,
p.alias_code,
p.p_name_inlocal_language,
p.barcode,
p.buy_price,
p.sell_price_tak,
p.sell_price_ko,
p.qty,
typeQty.qty_type,
b.brand_name,
CA.cat_name ,
SN.sn_name ,

P.P_Description ,
p.Barwari_Krin 

 FROM tbl_Purchase p 
 INNER JOIN tbl_Qty_Type typeQty ON P.qty_type_id=typeQty.id
 INNER JOIN tbl_Brand b ON p.brand_id=b.brand_id
 INNER JOIN tbl_Catigory CA ON P.cat_id =CA.cat_id
 INNER JOIN tbl_Sceintific_Name SN ON p.sn_id= SN.sn_id
 INNER JOIN tbl_Product_Creation
 GROUP BY P.P_Id, 
CA.Cat_Name ,
P.P_Name ,
SN .Sn_Name ,
P.sellPrice ,
P.buyPrice ,
P.Barcode , 
P.Qty ,
P.P_Description,
p.Barwari_Krin 
RETURN

Example 3: How to use multiple join in mysql

SELECT 
    t1.name name,
    t1.id id,
    t1.add_date add_date, 
    t2.soc_township township_name1,
    t2.soc_name soc_name,
    t3.name township_name
FROM block t1 
INNER JOIN society t2
    ON (t1.soc_id = t2.id)
INNER JOIN township t3
    ON (t2.soc_township = t3.id)