inner-join

问题 I have a function "fnc_FindIssueId" which accepts an object id and return its assigned issue Id. When I call the function using pure select statements, it works fine: select fnc_FindIssueId(150083); // returns 1 as issueId for objectId of 150083 select fnc_FindIssueId(150072); // returns 2 as issueId for objectId of 150072 But when I use it within an Inner Join, it goes into a never-ending loop: select so.id, si.id from smart_objects as so LEFT OUTER join smart_issues as si on si.id = fnc

问题 I am trying to do a Join query using CDBCriteria in Yii framework. The issue is the join query works successfully but it does not display the columns from other tables. I am doing in the following way $criteria = new CDbCriteria; $criteria->order = 't.id desc'; $criteria->select = '*'; $criteria->join = ' INNER JOIN table2 INNER JOIN table3 INNER JOIN table4'; When i run this, I can see only the mail table1 columns displayed. Other columns are not shown. In my model class, I have the relation

问题 I know that many threads has been created here & on the internet about this topic. But I really can't get the final point on the difference between the two statements! I mean, trying and trying I can reach all the results I need with my queries, but I really don't have full control of the knife! I'm considering myself a very good programmer and a very good SQL-ista and I feel a little ashamed about this... Here's an example: I have a table with the pages of a website ("web_page") a table with

问题 Can't seem to reach the next step in my update query. I'm able to successfully view columns related to the select no problem: SELECT sales_flat_order_grid.entity_id,sales_flat_order_grid.increment_id,sales_flat_order.coupon_code FROM sales_flat_order_grid INNER JOIN sales_flat_order ON sales_flat_order_grid.entity_id = sales_flat_order.entity_id WHERE sales_flat_order_grid.increment_id = "12345678"; This shows 3 columns all where related to the correct increment_id. The next step is to update

问题 How do we make Inner-Join or something a Cross-Join in PowerShell or PowerCLI? Even though im new to PowerCLI/PowerShell , I do have a basic grasp on them, yet have practically spent 2 days trying to figure this, going through numerous documentations and blogs to no avail. All I really want to know is if after typing my command Get-Content File.txt and getting: Output1 or Table1 is Name: Abc Group: Bad Policy: Great Name: redi Group: Good Policy: MAD etc. etc. 100s of these, and obviously

问题 I have got a couple of tables with a parent child relationship. I want to apply a sum function to one column of child table and return it with all data of parent table for example. Parent_table ID, Date, Title Child_table ID, another_id, column_to_sum //(ID is foreign key pointing to Parent_table) Sample Data in Parent_table 1, 22-11-2010 00:00:00 , 'Some Title' 2, 13-11-2010 00:00:00 , 'Some Title 2' Sample Data in Child_table 1, 1, 10 1, 2, 11 1, 8, 3 2, 5, 11 2, 8, 6 Output of the query

问题 I want to be able to inner join two tables based on the result of an expression. What I've been trying so far: INNER JOIN CASE WHEN RegT.Type = 1 THEN TimeRegistration ELSE DrivingRegistration AS RReg ON RReg.RegistreringsId = R.Id RegT is a join I made just before this join: INNER JOIN RegistrationTypes AS RegT ON R.RegistrationTypeId = RegT.Id This SQL-script does not work. So all in all, if the Type is 1, then it should join on the table TimeRegistration else it should join on

问题 Is there any difference in terms of performance between these two versions of the same query? --Version 1 SELECT p.Name, s.OrderQty FROM Product p INNER JOIN SalesOrderDetail s on p.ProductID = s.ProductID --Version 2 SELECT p.Name, s.OrderQty FROM Product p INNER JOIN (SELECT ProductID, OrderQty FROM SalesOrderDetail) s on p.ProductID = s.ProductID I've heard it said (by a DBA) that Version 2 is faster because it fetches, within the inner SELECT statement, only the columns that are required

问题 A common (i assume?) type of query: I have two tables ('products', 'productsales'). Each record in 'productsales' represents a sale (so it has 'date', 'quantity', 'product_id'). How do i efficiently make a query like the following: Retrieve the product names of all products that were sold more than X times between date Y and date Z. (X is the quantity sold not the number of transactions) 回答1: SELECT p.[name] FROM products p WHERE p.product_id in (SELECT s.product_id FROM productsales s WHERE

问题 I have a 11 tables [email1, email2, email3, ... email11] <?php $con = mysql_connect("localhost", "root", ""); $db = mysql_select_db("email-db", $con); $sql = "SELECT Contact_Email FROM email1, email2, email3, email4, email5"; $result = mysql_query($sql); while ($row = mysql_fetch_array($result)) { ?> <tr> <td><? echo $row['Contact_Email']; ?></td> <td><? echo '<br>'; ?></td> </tr> <? } ?> What I actually want to do it to select all emails from all tables using join on all of them. How can it