inner-join

SQL Server - inner join when updating [duplicate]

由 独自空忆成欢 提交于 2019-11-26 04:29:44
问题 This question already has answers here : Update a table using JOIN in SQL Server? (11 answers) Closed 6 years ago . I have the below query which does not work. What am I doing wrong? Is this even possible? UPDATE ProductReviews AS R INNER JOIN products AS P ON R.pid = P.id SET R.status = \'0\' WHERE R.id = \'17190\' AND P.shopkeeper = \'89137\' 回答1: UPDATE R SET R.status = '0' FROM dbo.ProductReviews AS R INNER JOIN dbo.products AS P ON R.pid = P.id WHERE R.id = '17190' AND P.shopkeeper =

SQL Inner-join with 3 tables?

由 僤鯓⒐⒋嵵緔 提交于 2019-11-26 03:20:04
问题 I\'m trying to join 3 tables in a view; here is the situation: I have a table that contains information of students who are applying to live on this College Campus. I have another table that lists the Hall Preferences (3 of them) for each Student. But each of these preferences are merely an ID Number, and the ID Number has a corresponding Hall Name in a third table (did not design this database...). Pretty much, I have INNER JOIN on the table with their preferences, and their information, the

Mixing ANSI 1992 JOINs and COMMAs in a query

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-11-26 02:25:46
问题 i\'m trying the following MySQL query to fetch some data: SELECT m.*, t.* FROM memebers as m, telephone as t INNER JOIN memeberFunctions as mf ON m.id = mf.memeber INNER JOIN mitgliedTelephone as mt ON m.id = mt.memeber WHERE mf.function = 32 But i always get the following error: #1054 - Unknown column \'m.id\' in \'on clause\' The column does exists and the query works fine with only one table (e.g. when i remove telephone) Does anybody know what I do wrong? 回答1: It seems your requirement is

Is having an 'OR' in an INNER JOIN condition a bad idea?

由 做~自己de王妃 提交于 2019-11-26 02:19:28
问题 In trying to improve the speed of an immensely slow query (several minutes on two tables with only ~50,000 rows each, on SQL Server 2008 if it matters), I narrowed down the problem to an OR in my inner join, as in: SELECT mt.ID, mt.ParentID, ot.MasterID FROM dbo.MainTable AS mt INNER JOIN dbo.OtherTable AS ot ON ot.ParentID = mt.ID OR ot.ID = mt.ParentID I changed this to (what I hope is) an equivalent pair of left joins, shown here: SELECT mt.ID, mt.ParentID, CASE WHEN ot1.MasterID IS NOT

Multiple INNER JOIN SQL ACCESS

由 泪湿孤枕 提交于 2019-11-26 01:50:56
问题 Syntax Error (missing Operator) in query expression \'tbl_employee.emp_id = tbl_netpay.emp_id INNER JOIN tbl_gross ON tbl_employee.emp_id = tbl_gross.emp_ID INNER JOIN tbl_tax ON tbl_employee.emp_id - tbl_tax.emp_ID\'. SELECT tbl_employee.emp_ID, tbl_employee.emp_name, tbl_gross.BasicSalary, tbl_gross.totalOT, tbl_netpay.totalGross, tbl_tax.totalLate, tbl_tax.allowance, tbl_tax.SSS, tbl_tax.PhilHealth, tbl_tax.GSIS, tbl_tax.HDMF, tbl_netpay.totalDeduc, tbl_netpay.emp_ti, tbl_netpay.emp_wt,

How to get matching data from another SQL table for two different columns: Inner Join and/or Union?

由 故事扮演 提交于 2019-11-26 01:09:41
问题 I\'ve got two tables in MS Access that keep track of class facilitators and the classes they facilitate. The two tables are structured as follows: tbl_facilitators facilID -> a unique autonumber to keep track of individual teachers facilLname -> the Last name of the facilitator facilFname -> the First name of the facilitator tbl_facilitatorClasses classID -> a unique autonumber to keep track of individual classes className -> the name of the class (science, math, etc) primeFacil -> the

Inner join of DataTables in C#

由 半城伤御伤魂 提交于 2019-11-26 00:37:51
问题 Let T1 and T2 are DataTable s with following fields T1(CustID, ColX, ColY) T2(CustID, ColZ) I need the joint table TJ (CustID, ColX, ColY, ColZ) How this can be done in C# code in a simple way? Thanks. 回答1: If you are allowed to use LINQ, take a look at the following example. It creates two DataTables with integer columns, fills them with some records, join them using LINQ query and outputs them to Console. DataTable dt1 = new DataTable(); dt1.Columns.Add("CustID", typeof(int)); dt1.Columns

How to get matching data from another SQL table for two different columns: Inner Join and/or Union?

由 浪子不回头ぞ 提交于 2019-11-25 22:55:14
I've got two tables in MS Access that keep track of class facilitators and the classes they facilitate. The two tables are structured as follows: tbl_facilitators facilID -> a unique autonumber to keep track of individual teachers facilLname -> the Last name of the facilitator facilFname -> the First name of the facilitator tbl_facilitatorClasses classID -> a unique autonumber to keep track of individual classes className -> the name of the class (science, math, etc) primeFacil -> the facilID from the first table of a teacher who is primary facilitator secondFacil -> the facilID from the first

Difference between JOIN and INNER JOIN

由 江枫思渺然 提交于 2019-11-25 22:49:00
问题 Both these joins will give me the same results: SELECT * FROM table JOIN otherTable ON table.ID = otherTable.FK vs SELECT * FROM table INNER JOIN otherTable ON table.ID = otherTable.FK Is there any difference between the statements in performance or otherwise? Does it differ between different SQL implementations? 回答1: They are functionally equivalent, but INNER JOIN can be a bit clearer to read, especially if the query has other join types (i.e. LEFT or RIGHT or CROSS ) included in it. 回答2:

What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]

由 橙三吉。 提交于 2019-11-25 22:14:58
问题 This question already has answers here : What is the difference between “INNER JOIN” and “OUTER JOIN”? (25 answers) Closed 4 years ago . What\'s the difference between INNER JOIN , LEFT JOIN , RIGHT JOIN and FULL JOIN in MySQL ? 回答1: Reading this original article on The Code Project will help you a lot: Visual Representation of SQL Joins. Also check this post: SQL SERVER – Better Performance – LEFT JOIN or NOT IN?. Find original one at: Difference between JOIN and OUTER JOIN in MySQL. 回答2:
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