I have two database table like below: Form Id Name Fields(varchar-255) FormFields Id Name InputType Sample data for Form Sample data for FormFields Now I write query as below: And I get only one record as below: But I want all the records of FormFields table whose Id is present in the Fields columns of Form table. I want result
Tag: subquery
What is the difference between LATERAL JOIN and a subquery in PostgreSQL?
Since Postgres came out with the ability to do LATERAL joins, I’ve been reading up on it, since I currently do complex data dumps for my team with lots of inefficient subqueries that make the overall …
MySQL/MariaDB – order by inside subquery
I used the following query with MySQL 5.5 (or previous versions) for years without any problems: SELECT t2.Code from (select Country.Code from Country order by Country.Code desc ) AS t2; The order …
Rails Activerecord Relation: using subquery as a table for a SQL select statement
Can somebody help me figure out how to write the following SQL using Rails (I’m using Rails 4) Activerecord methods? I know you can do this with find_by_sql but I’d like to preserve the active record relation. Here’s the sql for a postGreSQL db that I’m trying to create: For my subquery, I have the following (which generates the sql
How do I use a subquery to show a column that has never been assigned to a different table?
I’m trying to Write a SELECT statement that returns the category_name column from the Categories table and returns one row for each category that has never been assigned to a product in the Products table. there are four categories in the categories table and only three have been used in the products table. How do i make it show the
Postgres Error: More than one row returned by a subquery used as an expression
I have two separate databases. I am trying to update a column in one database to the values of a column from the other database: UPDATE customer SET customer_id= (SELECT t1 FROM dblink(‘port=5432, …
Select one row with MAX(column) for known other several columns without subquery
My table contains votes of users for different items. It has the following fields: I understand how to get the last vote of #user# for #item#, but it uses subquery: It works, but it looks quite stupid to me… There should be a more elegant way to get this one record. I tried the approach suggested here, but I cannot
Concat SQL result
I’m quite new to SQL and I am using MS Access’s ListBox component which requires a query to display data. The following are the tables involved to make the query: TABLE: Blocks +—-+——–+ | ID | B_Name | +—-+——–+ | 1 | blockF | | 2 | blockE | . . . TABLE: Rooms +—-+——+——–+——-+—–+———+——-+——+ | ID | B_ID |
sql update multiple rows with subselect
I am trying to copy the corresponding graduation_date values from the graduation_term table into the rows in the user_education_mba_school table that have the matching graduation_term_id. Here is my …
How to get file extension of file as a result of sql query?
I have a table named datas and I’m executing a query like this: SELECT linkurl AS DOWNLOADURL, lastrevlevel AS VERSION, code AS DESCRIPTION, created AS RELEASEDATE, name …