mysql returning more than one row -


i have mysql query needs return supplier id supplier table searching supplier name keeps returning multiple values.

create definer=`root`@`%` procedure `sp_insert_sup_order`( supname varchar(50), dat date, total decimal(10,2) ) begin insert supplier_order ( supplier_id, supdate, total, sup_name ) values ( (select supplier_id supplier supplier_id.supname =  supname ), dat, total, supname );

thats query. appreciated 

(select supplier_id supplier supplier_id.supname =  supname )

this should this:

(select supplier_id supplier supplier.supname =  supname ),

and why store supplier name , id in order ? should not done, image have change name of supplier, have update orders. supplier id should stored in order table!


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