子查询返回的值超过1。当子查询跟随=，..或子查询用作表达式时，不允许这样做

Question

我有以下存储过程进行预约。我没有完成插入值的前端所以我使用sql server菜单中的execute storage过程插入到数据库中但是它给了我{{1消息

subquery returned more than 1 value and 1 row affected

这是选择ALTER PROCEDURE [dbo].[Usp_makereservation] --roombookingdetails @refno VARCHAR(50), @propertyid int, @roomtype VARCHAR(3), @groupcode VARCHAR(30), @companycode VARCHAR(10), @arrivaldate DATETIME, @arrivalplan VARCHAR(3), @departuredate DATETIME, @departureplan VARCHAR(3), @createdby INT, --roombookingguestdetails @subsrno VARCHAR(50), @roomno VARCHAR(30), @guesttitle VARCHAR(30), @lname VARCHAR(50), @fname VARCHAR(50), @mname VARCHAR(50), @address VARCHAR(100), @city VARCHAR(30), @state VARCHAR(30), @country INT, @zipcode VARCHAR(50), @telno VARCHAR(15), @mobile VARCHAR(15), @fax VARCHAR(50), @gueststatus INT, @designation VARCHAR(50), @occupation VARCHAR(50), @arrivalfrom VARCHAR(50), @departureto VARCHAR(50), @leader BIT, @spclinstrctn VARCHAR(1000), @checkinflg BIT, --roombookingoccupancy @singlebooked INT, @singleprovisional INT, @singleconfirmed INT, @singlewaitlisted INT, @doublebooked INT, @doubleprovisional INT, @doubleconfirmed INT, @doublewaitlisted INT, @triplebooked INT, @tripleprovisional INT, @tripleconfirmed INT, @triplewaitlisted INT, @quadbooked INT, @quadprovisional INT, @quadconfirmed INT, @quadwaitlisted INT, @marketsegID INT, @businesssrcID INT, @guestcategoryID INT, @gueststatusID INT, @totalpax INT, @adultpax INT, @childpax INT, @infantpax INT, @extraadultpax INT, @extrachildpax INT, @complementarypax INT, @noshow INT, @checkinrooms INT, @checkinpax INT AS BEGIN BEGIN try BEGIN TRAN INSERT INTO roombookingdetails (reservationno, srno, refno, propertyid, roomtype, groupcode, companycode, arrivaldate, arrivalplan, depaturedate, depatureplan, createdon, createdby) VALUES ((SELECT Isnull(Max(reservationno) + 1, 1) FROM roombookingdetails), (SELECT Isnull(Max(srno) + 1, 1) FROM roombookingdetails), @refno, @propertyid, @roomtype, @groupcode, @companycode, @arrivaldate, @arrivalplan, @departuredate, @departureplan, Getdate(), @createdby) INSERT INTO roombookingguestdetails (reservationno, srno, subsrno, roomno, guesttitle, lastname, firstname, midname, [address], city, [state], country, zipcode, telno, mobile, fax, gueststatus, designation, occupation, arrivalfrom, depatureto, leader, specialinstruction, checkinflag, createdon, createdby) VALUES ((SELECT [reservationno] FROM roombookingdetails), (SELECT Isnull(Max(srno) + 1, 1) FROM roombookingguestdetails), @subsrno, @roomno, @guesttitle, @lname, @fname, @mname, @address, @city, @state, @country, @zipcode, @telno, @mobile, @fax, @gueststatus, @designation, @occupation, @arrivalfrom, @departureto, @leader, @spclinstrctn, @checkinflg, Getdate(), @createdby) INSERT INTO roombookingoccupancy (reservationno, srno, singlebooked, singleprovisional, singleconfirmed, singlewaitlisted, doublebooked, doubleprovisional, doubleconfirmed, doublewaitlisted, tripplebooked, trippleprovisional, trippleconfirmed, tripplewaitlisted, quadbooked, quadprovisional, quadconfirmed, quadwaitlisted, marketsegmentid, businesssourceid, guestcategoryid, gueststatusid, totalpax, adultpax, childpax, infantpax, extraadultpax, extrachildpax, complementrypax, noshow, checkinrooms, checkinpax, createdon, createdby) VALUES ((SELECT [reservationno] FROM roombookingdetails), (SELECT Isnull(Max(srno) + 1, 1) FROM roombookingoccupancy), @singlebooked, @singleprovisional, @singleconfirmed, @singlewaitlisted, @doublebooked, @doubleprovisional, @doubleconfirmed, @doublewaitlisted, @triplebooked, @tripleprovisional, @tripleconfirmed, @triplewaitlisted, @quadbooked, @quadprovisional, @quadconfirmed, @quadwaitlisted, @marketsegID, @businesssrcID, @guestcategoryID, @gueststatusID, @totalpax, @adultpax, @childpax, @infantpax, @extraadultpax, @extrachildpax, @complementarypax, @noshow, @checkinrooms, @checkinpax, Getdate(), @createdby) COMMIT TRAN END try BEGIN catch PRINT 'Rollback' SELECT ERROR_NUMBER() AS ErrorNumber, ERROR_SEVERITY() AS ErrorSeverity, ERROR_STATE() AS ErrorState, ERROR_PROCEDURE() AS ErrorProcedure, ERROR_LINE() AS ErrorLine, ERROR_MESSAGE() AS ErrorMessage; ROLLBACK END catch END 命令

后生成的查询

execute stored procedure

Answer 1

您的下列声明可能会返回超过单个值的错误。 请检查一下。

> SELECT [reservationno]  FROM   roombookingdetails

您已在插入声明中使用过它。

Answer 2

当存在此类问题或存在超过1条记录时，您必须在子查询中使用where clause，Top operator，Min,Max,Avg。

Answer 3

从第一次插入

替换此(SELECT [reservationno] FROM roombookingdetails)

有了这个  (SELECT Isnull(Max(reservationno) + 1, 1) FROM roombookingguestdetails)

和第二次插入的(SELECT [reservationno] FROM roombookingdetails)

使用此(SELECT Isnull(Max(reservationno) + 1, 1) FROM (RoomBookingOccupancy)

解决了我的问题