数据库提高查询效率
ALTER PROCEDURE FindeAllOrderCompanyNO
@companyNO varchar(50),
@supplierNO varchar(50),
@settlement int,
@endDateTime datetime,
@sign bit,
@ticketingTime datetime
AS
declare @sql varchar(max)
SET NOCOUNT ON;
set @sql =' select * from vw_tickDetail_tickorders_tickAirLines where CompanyNO in (select CompanyNO from TicketOrders GROUP by CompanyNO) and GetTicketTime<'''+cast(@endDateTime as varchar(20))+''' and GetTicketTime>='''+cast(@ticketingTime as varchar(20))+''' and GetTicketSign='''+cast(@sign as varchar(20))+''' '
if @companyNO is not null and @companyNO!=''
set @sql +=' and CompanyNO ='''+@companyNO+''''
if @supplierNO is not null and @supplierNO!=''
set @sql +=' and tickDetailSupplierNO='''+@supplierNO+''''
if @settlement !='' and @settlement >-1
set @sql +=' and SettlementStatus='+@settlement+''
print @sql
exec (@sql)
RETURN
各位大侠,,怎么修改才能使这个存储过程 提高查询效率