Sql, SQLite Select with Inner Join

SQLite: Inner join on result set

The logic of some_query can be written more efficiently with INTERSECT:

SELECT el FROM set1
INTERSECT
SELECT el FROM set2

and if you use a CTE for some_query then for your requirement you can do this:

WITH cte AS (
  SELECT el FROM set1
  INTERSECT
  SELECT el FROM set2
)
SELECT el1, el2 
FROM pairs
WHERE el1 IN cte AND el2 IN cte

SQLite select query if inner join query doesn't exists

You would do a LEFT JOIN and put the language ID into the join condition.

SELECT
    COALESCE(t.TranslatedName, f.DefaultName) FoodName 
FROM 
    Foods f
    LEFT JOIN FoodNameTranslations t ON t.Food_ID = f.Food_ID AND t.Language_ID = 1
WHERE
    f.Food_ID = 5

Sqlite: select, join using like for the join fields

Here is a fiddle with what you want.

I've left it as a left outer join as this will mean you will get counts of zero included for VirtualControllers that have no Neighbours (rather than just exclude the missing rows - if you want to exclude them change it to be an INNER JOIN)

The main issue was your concatenation in your LIKE, SQLite uses double pipe || for string concatenation not +.

There are two selects in the fiddle above, the first gives what you asked for, with the count of 4. The second also groups by the device name, in case you wanted to see the distinction between the two.

Your SQL ends up being as follows:

SELECT TransitNumber, DeviceName, COUNT (NeighbourName)
FROM VirtualController V
LEFT OUTER JOIN Neighbours N ON N.DeviceName LIKE '%' || V.TransitNumber || '%'
GROUP BY TransitNumber;

like keyword in inner join sqlite

In SQLite, the + operator is a mathematical add, not a string concatenator (like it is in other RDBMS such as SQL Server). For string concatenation in SQLite, use a double pipe ||.

select categories.category_code, services.*
from categories join services
  on services.category_code like '%' || categories.category_code || '%'
where services.country_code like '%IN%'

sql, sqlite SELECT with inner join

You'll need to use table aliases.

SELECT
        orders.id,
        orders.order_number,
        clients.first_name,
        clients.last_name,
        creator.name AS creator_user_name
        editor.name AS editor_user_name
FROM orders

INNER JOIN clients ON
        orders.client_id = clients.id

INNER JOIN users creator ON
        orders.created_by = creator.id

INNER JOIN users editor ON
        orders.edited_by = editor.id

How to select the distinct values of three sql tables and perform inner join with python sqlite3?

here is the right sql syntax , however you need to provide sample data and desired output if this is not the right output :

SELECT
    lpq.lesson_id,
    question_id,
    topic_id,
    lesson_id,
    question_id,
    subject_id,
    question_type_id,
    knowledge_type_ids,
    complexity_level
FROM  lesson_practice_questions as lpq
INNER JOIN chapter_lessons as cl on cl.topic_id = 2 and cl.lesson_id = lpq.lesson_id
INNER JOIN questions as q ON q.question_id = lpq.question_id;

Inner join in SQLite3

You need table aliases:

SELECT t1.id, t1.cd1, t1.cd2, t1.cd3, t1.cd4, ?.ab
FROM table1 t1 JOIN
     table2 t21
     ON t21.dx = t1.cd1 JOIN
     table2 t22
     ON t22.dx = t1.cd2 JOIN
     table2 t23
     ON t23.dx = t1.cd3 JOIN
     table2 t24
     ON t24.dx = t1.cd4 
GROUP BY 1, 2, 3, 4, 5, 6;

I don't know which table ab is supposed to come from, so you need to fill that in.

Inner join query with array in result field

You could use GROUP_CONCAT:

SELECT c.id, c.firstname, c.lastname, GROUP_CONCAT(p.number) AS numbers
FROM contacts c
LEFT JOIN phone_numbers p
  ON c.id = p.contact_id
GROUP BY c.id, c.firstname, c.lastname;

SqlFiddleDemo

sqlite3 inner join comparing all columns

In a compound SELECT, all columns in the subqueries are compared:

SELECT * FROM t1
INTERSECT
SELECT * FROM t2;

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