python中的 sql语句用法

函数中应用sql语句
def _get_cust_number(self,cr,uid,ids,field_name,args,context=None):
    res={}
    for order in self.browse(cr, uid, ids, context=context):
       #获取单据信息     
       aa=order.origin
            if aa:
                sql="select t1.cust_numr_no from stock_fah t0 left join sale_orde t1 on t0.origin=t1.name where t0.origin='%s'"%(aa)
                cr.execute(sql)
                dict4=cr.dictfetchall()
                if dict4:
                    dd=dict4[0]['cust_numr_no']
                    res[order.id]=dd
                else:
                    res[order.id]=''
            else:
                res[order.id]=''
    return res

或者着一种

函数中另外一种写法cr.execute
cr.execute('''select ref_line_id,nolqty from( select ref_line_id,sum(COALESCE(case when t0.location_id=get_warehouse_id('成仓') then product_qty  when t0.location_id=get_warehouse_id('原仓')  then product_qty  else -1*product_qty end,0) ) dlvqty from
                                 stock_ynum t0 left join stock_fah t1 on t0.picking_id=t1.id
                                  where t0.state='done' and ((t0.location_id=get_warehouse_id('成仓') and t0.location_dest_id=get_warehouse_id('Customers')) or (t0.location_id=get_warehouse_id('Customers')
                                   and t0.location_dest_id=get_warehouse_id('成仓')))
                                   or ((t0.location_id=get_warehouse_id('原仓')
                                    and t0.location_dest_id=get_warehouse_id('Customers')) or (t0.location_id=get_warehouse_id('Customers') and t0.location_dest_id=get_warehouse_id('原仓')))
                                    group by t0.product_id,ref_num,ref_line_id)t where ref_line_id in %s''',(tuple(ids),))
        jhqty = dict(cr.fetchall())

或者创建views

初始化执行的函数：创建一个视图，用sql语句    ，紫色为sql语句
 
def init(self,cr):
        tools.sql.drop_view_if_exists(cr, 'cust_cp_info_report')
        cr.execute("""
            create or replace view cust_product_info_report as (
               select t0.id,t0.hpartner_id as hpartner_id, t0.khwl_code as khwl_code,t1.product_mp_id as productn,
               t3.pname,t3.mmar,t3.spec,
               t4.id as name_uom,  t5.price as custo_price,t0.product_meno as product_meno ,t0.meno as meno,t5.date_from,t5.date_to
                from  product_custo_info t0
                LEFT JOIN product_order t1 on t0.product_tmpl_id=t1.product_tmpl_id
                LEFT JOIN product_model t3 on t3.id=t1.product_tmpl_id
                LEFT JOIN ke_partner t2 on t2.id=t0.hpartner_id
                LEFT JOIN product_dan t4 on  t3.uom_id=t4.id
                left join partner_cp_price t5  on t5.ppp_line_id=t0.id
                where  (now()>=t5.date_from  and now()<=t5.date_to) or  (t5.date_from is null and t5.date_to is null )  or
                (t5.date_from is null and (now()<=t5.date_to))  or (t5.date_to is null and (now()>=t5.date_from))
            )
        """)