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Questions tagged [join]

A JOIN is a general operation in relational algebra for a combining operation on two or more relations in a relational database system. JOIN is also keyword of the SQL language for performing this operation.

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SQL Join two query

I need some help combining these two queries so I can get this in one single view. Query 1 select t.*, n.caption, n.description from ( select NodeID, count(distinct cpuindex) as ...
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2answers
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Merging odd number of data frames with suffixes

I am trying to merge a list of data frames, and I came across many different answers in this community like this R - reduce with merge and more than 2 suffixes (or: how to merge multiple dataframes ...
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SQL Join - get rows that meet criteria from foreign key table

I need to find the rows in one table that meet specific attributes specified in a foreign key table. I have these two tables: ITEM PK: ItemId Text: nvarchar ITEMATTRIBUTE PK: ItemAttributeId FK: ...
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N1ql Join and aggregate with additional values

I have a single bucket (Couchbase Community edition 6.5) consisting of the following documents: employees { employeeGroupId: string, type: "Employee" } clocks { employeeId: string, ...
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3answers
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Oracle SQL - Count only one of specified value

I do hope someone can help me with this. I am doing two count functions on on of my columns, both specified by where the column has a specific text (see below code). On my count for meeting (WHERE ...
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1answer
26 views

Flattening data in SQL server by joining multiple tables

I want to flatten parent-child tables for data analysis purposes. I have Service order table tssoc210 as orno|acln 1 |10 1 |20 2 |20 . . it's activities(labour,material,other) are maintained ...
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28 views

Use Laravel Eloquent joining

Hello I want to retrieve only rows of quizzes that the student didn't take yet When he completes a quiz the variable done in QuizStudent table is going to become 1 Quiz table My relationships: ...
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2answers
44 views

How do I get All actors that haven't appeared in R rated films

I want to get All actors that haven't appeared in R rated films It was easy to do with sub-queries select * from actor where actor_id not in (select actor_id from actor inner join ...
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How get products from product table based on the category search in django restframework, How do inner join in django restframework

I am very much new in django restframework,I tried to create a search api. I have 2 models designed class Category(models.Model): name = models.CharField(max_length=200) def __str__(self): ...
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0answers
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Get values using foreign key passing through 2 tables [duplicate]

I have to select 2 values from a table, but to get to this table I have to pass through other 2 tables (my table -> middle table -> destination table, all of them have foreign keys). I tried adapting ...
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Is it possible to join two method which is Fuzzy Logic and Optimization?

I was wondering is it possible to join two methods, fuzzy logic and optimization? because I was going to answer an interview question but I never heard of this fuzzy logic question before. This is ...
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3answers
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SQL query to find duplicate records and discount from COUNT with condition AND [closed]

I am using below SQL query to count the records. I would like to discount the duplicate testID after I got the count. example: select count (*) from PRODUCT MP join PRODUCT_UOM pu on pu....
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2answers
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Perform left join and copy the column value if it is present in another table based on the column combination [closed]

Lets say I have a table A: name subject marks time a maths 0 10:10:00 a maths 0 10:10:10 a maths 0 10:10:20 a maths 0 10:10:30 e ...
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2answers
34 views

How to make a query between two tables (SQL)? [closed]

So I have two tables: TOURS: RESERVATIONS: ID | Capacity TOUR_ID | ADULT | CHILD -----|---------- -----------|---...
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1answer
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insert html tag in join method at angular 2+ not working

Is there any reason this is not working? The <br> or any html tags is not interpreted. in HTML: {{data.prContent.join(' <br> ')}} in Json file: "prContent": [ "Banana",...

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