我正在使用存储过程来获取数据。我在其中使用多个连接和内部查询，这是使它太慢的原因。是否有任何替代方法可以避免主详细信息表的内部查询？
实际上早些时候我使用LINQ查询来获取数据，但执行时间太长，然后选择存储过程，但也需要花费相同的时间来执行。那我怎么能让它更快？
这是我的存储过程：
ALTER PROCEDURE USP_GetUserDetailByID
@id INT
AS
BEGIN
SELECT TOP 1
uinfo.ID ID,
uinfo.UniqueUserID UniqueUserID,
uinfo.ID UserInfoID,
uinfo.ReferredID ReferredID,
uinfo.UserTypeID UserTypeID,
uinfo.GroomBrideName GroomBrideName,
uinfo.EmailID EmailID,
uinfo.[Password] [Password],
uinfo.ProfileCreatedFor ProfileCreatedFor,
uinfo.DateOfBirth DateOfBirth,
uinfo.Gender Gender,
uinfo.Age Age,
uinfo.Height Height,
uinfo.City City,
uinfo.Country Country,
uinfo.Phone Phone,
uinfo.Mobile Mobile,
uinfo.RegisteredMobileNumber RegisteredMobileNumber,
uinfo.About About,
uinfo.[Status] [Status],
rel.Religion Religion,
rel.MotherTongue MotherTongue,
rel.Section Section,
rel.Division Division,
edu.EducationLevel EducationalLevel,
edu.EducationFeild EducationalField,
edu.GraduationDegree GraduationDegree,
edu.MasterDegree MasterDegree,
edu.WorkWith WorkWith,
edu.WorkingGroup WorkingGroup,
edu.WorkingAs WorkingAs,
edu.AnnualIncome AnnualIncome,
edu.InterestedInSettlingAbroad InsertedInSettingAbroad,
hob.Hobbies Hobbies,
hob.DressStyle,
hob.SportsFitness SportsFitness,
hob.FavouriteCuisine FavouriteCuisine,
hob.FavouriteVacationDestination FavouriteVacationDestination,
hob.FavouriteMusic FavouriteMusic,
hob.FavouriteBooks FavouriteBooks,
hob.PreferredMovies PreferredMovies,
life.Diet Diet,
life.Smoke Smoke,
life.Drink Drink,
life.SkinTone Complexion,
life.BodyType BodyType,
life.BloodGroup BloodGroup,
life.[Weight] [Weight],
life.ResidentialStatus ResidentialStatus,
life.OwnHouse OwnHouse,
life.OwnCar OwnCar,
life.LanguageKnown LanguageKnown,
fd.FamilyValue FamilyValue,
(SELECT DetailData FROM MasterDetails WHERE ID = fd.FamilyValue) FamilyValueText,
fd.FamilyType FamilyType,
(SELECT DetailData FROM MasterDetails WHERE ID = fd.FamilyType) FamilyTypeText,
fd.FamilyStatus FamilyStatus,
(SELECT DetailData FROM MasterDetails WHERE ID = fd.FamilyStatus) FamilyStatusText,
fd.Father Father,
(SELECT DetailData FROM MasterDetails WHERE ID = fd.Father) FatherText,
fd.Mother Mother,
(SELECT DetailData FROM MasterDetails WHERE ID = fd.Mother) MotherText,
fd.Brothers Brothers,
fd.MarriedBrothers MarriedBrothers,
fd.Sisters Sisters,
fd.MarriedSisters MarriedSisters,
fd.LivingWithParents LivingWithParents,
rel.ReligiousValues ReligiousValues,
uinfo.HightLightUserAbout HightLightUserAbout,
uinfo.FbUserDetail FbUserDetail,
(SELECT DetailData FROM MasterDetails WHERE ID = uinfo.ProfileCreatedFor) ProfileCreatedText,
(SELECT DetailData FROM MasterDetails WHERE ID = uinfo.Height) HeightText,
(SELECT ID FROM MasterDetails WHERE ID = uinfo.MaritalStatus) MaritalStatus,
(SELECT DetailData FROM MasterDetails WHERE ID = uinfo.MaritalStatus) MaritalStatusText,
(SELECT ID FROM MasterDetails WHERE ID = uinfo.[State]) [State],
CASE WHEN uinfo.City IS NULL THEN '' ELSE (SELECT DetailData FROM MasterDetails WHERE ID = uinfo.City) END as CityText,
CASE WHEN uinfo.[State] IS NULL THEN '' ELSE (SELECT DetailData FROM MasterDetails WHERE ID = uinfo.[State]) END as StateText,
(SELECT MasterCategoryID FROM MasterDetails WHERE ID = uinfo.Country) CountryId,
(SELECT DetailData FROM MasterDetails WHERE ID = uinfo.Country) CountryText,
(SELECT DetailData FROM MasterDetails WHERE ID = rel.MotherTongue) MotherTongueText,
(SELECT DetailData FROM MasterDetails WHERE ID = rel.Section) SectionText,
(SELECT DetailData FROM MasterDetails WHERE ID = rel.Division) DivisonText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.EducationLevel) EducationalLevelText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.EducationFeild) EducationalFeildText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.GraduationDegree) GraduationDegreeText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.MasterDegree) MasterDegreeText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.WorkWith) WOrkingWithText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.WorkingGroup) WorkingGroupText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.WorkingAs) WorkingAsText,
(SELECT DetailData FROM MasterDetails WHERE ID = edu.AnnualIncome) AnnualIncomeText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.Hobbies) HobbiesText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.DressStyle) DressStyleText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.SportsFitness) SportsFitnessText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.FavouriteCuisine) FavouriteCuisineText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.FavouriteMusic) FavouriteMusicText,
(SELECT DetailData FROM MasterDetails WHERE ID = hob.PreferredMovies) PreferredMoviesText,
(SELECT DetailData FROM MasterDetails WHERE ID = life.Diet) DietText,
(SELECT DetailData FROM MasterDetails WHERE ID = life.SkinTone) ComplexionText,
(SELECT DetailData FROM MasterDetails WHERE ID = life.BodyType) BodyTypeText
FROM
UsersInfo uinfo
LEFT JOIN
EducationAndOccupation edu on uinfo.ID = edu.UserID
LEFT JOIN
ReligionAndEthinicity rel on uinfo.ID = rel.UserID
LEFT JOIN
HobbiesAndInterests hob on uinfo.ID = hob.UserID
LEFT JOIN
LifestyleAndAttributes life on uinfo.ID = life.UserID
LEFT JOIN
FamilyDetails fd on uinfo.ID = fd.UserID
WHERE
uinfo.ID = @id
END
答案 0 :(得分：1)
您应该做的第一件事是通过EXPLAIN运行该语句，以查看您的查询正在执行的操作。
在SSMS中，确保选择了数据库并打开新的查询窗口。将SQL粘贴到窗口中，然后选择Query - ＆gt;显示估计执行计划（Ctrl + L）
查询计划显示在底部的窗口中。看看计划，它会告诉你需要花时间的地方（相对于批次的百分比）如果你不熟悉计划，请看看这里......
http://www.simple-talk.com/sql/performance/execution-plan-basics/[ ^]
您还可以通过调优顾问程序运行查询，以查看是否建议使用任何索引。但是，如果表titlefee是具有最多记录的表，则需要考虑对其执行的操作。
1）您通过字段dtIssue限制此表的结果。此字段是索引的一部分，还是导致表扫描（查看执行计划）
2）您正在按字段curAmount进行汇总 - 这可能是索引编制的。
使用执行计划+查询调优顾问程序，您应该能够索引表以获得最佳性能。
但是，通过引入索引，您必须权衡表更新的频率\更新数据的过程（例如用户应用程序？隔夜ETL？）。获得READ与WRITE性能的正确平衡可能是一种黑暗的艺术：）
答案 1 :(得分：0)
尝试执行您的查询计划，它会引导您加入更多成本，并且如果需要，它还会建议索引。