left-join

问题 this is table1 id1 Name ------------ 1 value1 2 value2 this is table2 id2 Name id1 --------------------- 1 value1 2 2 value2 1 this is table3 id3 Name id2 --------------------- 1 value1 2 2 value2 1 this is table4 id4 Name id3 --------------------- 1 value1 2 2 value2 1 I Want to join above 4 tables in Yii2 with model select * from table1 left join table2 on table2.id2 = table1.id1 left join table3 on table2.id3 = table1.id2 left join table4 on table2.id4 = table1.id3 回答1: 1. Use Yii2

问题 this is table1 id1 Name ------------ 1 value1 2 value2 this is table2 id2 Name id1 --------------------- 1 value1 2 2 value2 1 this is table3 id3 Name id2 --------------------- 1 value1 2 2 value2 1 this is table4 id4 Name id3 --------------------- 1 value1 2 2 value2 1 I Want to join above 4 tables in Yii2 with model select * from table1 left join table2 on table2.id2 = table1.id1 left join table3 on table2.id3 = table1.id2 left join table4 on table2.id4 = table1.id3 回答1: 1. Use Yii2

问题 I'm trying to get data from multiple tales using LEFT OUTER JOIN but I'm getting a fatal error. Table names, field names, db connection are correct. $sql = "SELECT shipping_info.shipping_id, service1.service, package1.package_type, countries1.country AS fromCountry, countries2.country AS toCountry, countries3.country AS resiCountry, customer1.name, FROM shipping_info LEFT OUTER JOIN service_types AS service1 ON shipping_info.service_type = service_types.serviceType_id LEFT OUTER JOIN package

问题 am trying to scrape movie sets from 2 different websites And I want to combine these 2 informations, and tied them up using the movie title name. Here is the first dataset looks like structure(list(event_name = c("maze runner: the death cure", "star wars: the last jedi", "spider-man: homecoming"), event_start_time = structure(c(100, 200, 300), class = "Date"), movie_sold_all = c(100L, 200L, 300L)), .Names = c("event_name", "event_start_time", "movie_sold_all" ), row.names = c(NA, 3L), class =

问题 I created a Django QuerySet which count values but unfortunately it do not show 0 values. Therefore I want to merge my two list like left join in SQL. I show my inputs and desired outputs . INPUT 1 (Django Query 1): I print it out like this: for i in query_1: print (i['day'], i['count_1']) 2018-01-17 00:00:00+01:00 49 2018-01-16 00:00:00+01:00 139 2018-01-15 00:00:00+01:00 144 2018-01-14 00:00:00+01:00 142 2018-01-13 00:00:00+01:00 141 2018-01-12 00:00:00+01:00 144 2018-01-11 00:00:00+01:00

问题 I created a Django QuerySet which count values but unfortunately it do not show 0 values. Therefore I want to merge my two list like left join in SQL. I show my inputs and desired outputs . INPUT 1 (Django Query 1): I print it out like this: for i in query_1: print (i['day'], i['count_1']) 2018-01-17 00:00:00+01:00 49 2018-01-16 00:00:00+01:00 139 2018-01-15 00:00:00+01:00 144 2018-01-14 00:00:00+01:00 142 2018-01-13 00:00:00+01:00 141 2018-01-12 00:00:00+01:00 144 2018-01-11 00:00:00+01:00

问题 I am working on an application that allows users to dynamically choose what they see. The list of columns and tables those belong to is huge. I'm working on building a dynamic query but I don't want to have to store all the join logic if I don't have too. An example is I have a query that has LEFT JOINS for 10 tables but I only select and filter by one table. Is SQL Server 2012 Smart enough to not join on the other tables that are not needed? I know Oracle's DBMS works like this but my

问题 I have the following query: $appointments = Appointment::orderBy('appointment', 'asc') ->leftJoin('appointments_labels', 'appointments_labels.id', '=', 'appointments.label_id') ->leftJoin('appointments_statuses', 'appointments_statuses.id', '=', 'appointments.status_id') ->select('appointments.id', 'appointments.appointment', 'appointments.label_id', 'appointments.status_id', 'appointments_labels.label', 'appointments_statuses.status') ->get(); What I am using this for is basically to display

问题 Trying to calculate daily acceptance ratios from the 'connecting' table which has 4 fields with sample values: date action sender_id recipient_id '2017-01-05', 'request_link', 'frank', 'joe' '2017-01-06', 'request_link', 'sally', 'ann' '2017-01-07', 'request_link', 'bill', 'ted' '2017-01-07', 'accept_link', 'joe', 'frank' '2017-01-06', 'accept_link', 'ann', 'sally' '2017-01-06', 'accept_link', 'ted', 'bill' Because there are 0 accepts and 1 request on 01-05, its daily acceptance ratio should

问题 I need a lot of help with my join statement, as it multiplies the rows of the two tables that I'm trying to join: My Sample data: SAPId CompendiumId Seats ----- ------------ ----- 1 443 21 2 443 22 3 443 23 4 443 24 5 443 25 6 571 25 7 352 20 QBId CompendiumId Slots ----- ------------ ----- 1 443 26 2 443 27 3 571 25 4 571 23 My desired output is: CompendiumId Seats Slots ------------ ----- ----- 443 115 53 571 25 48 352 20 0 but the result of my code is: CompendiumId Seats Slots ------------