sql-match-all

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How to filter SQL results in a has-many-through relation

Assuming I have the tables student, club, and student_club: student { id name } club { id name } student_club {[详细]

2023-04-04 08:03 分类：问答
Join: three tables and a or condition

I think I should know this somehow, especially after reading a lot of questions and answers regarding \"The condition must go into the ON clause, not in the WHERE clause\". However, I am still lost.[详细]

2023-03-30 19:22 分类：问答
Vanilla SQL that selects multiple values in single column

If I have a table with customer IDs in one column and time zones in another, is there a plain SQL statement that can select all customer IDs that have different time zone values?In other words, I want[详细]

2023-03-16 02:27 分类：问答
Mysql select data using multiple conditions

I have a table like idfid 2053 2353 5353 Here I need to return true when my condition is something like .. where fid=53 and id in(20,23,53)[详细]

2023-01-09 08:06 分类：问答
How do I write a named scope to filter by all of an array passed in, and not just by matching one element (using IN)

I have two models, Project and Category, which have a many-to-many relationship between them. The Project model is very simple:[详细]

2023-01-07 06:20 分类：问答
Select in a many-to-many relationship in MySQL

I have two tables in a MySQL database, Locations and Tags, and a third table 开发者_如何学运维LocationsTagsAssoc which associates the two tables and treats them as a many-to-many relationship.[详细]

2023-01-02 23:41 分类：问答
Get group key from bridge table

I\'m developing an ETL process, and need a bridge table for a one-to-many relationship between a fact table and a dimension table (MySQL database). There is a limited number of combinations (some thou[详细]

2023-01-02 18:07 分类：问答
Translating INTERSECT statement to MySQL

I have the following query using INTERSECT and I can\'t figure out how to t开发者_运维问答ranslate it to MySQL using INNER JOIN.[详细]

2022-12-15 22:49 分类：问答
SQL Select Condition Question

I have a quick question about a select statement condition. I have the following table with the following items. What I need to get is the object id that matches both type id\'s.[详细]

2022-12-14 04:57 分类：问答
SQL Query problem

Consider two table.Employee and Project.Employee table has fields like eid,ename.Project table has fields like pid,pname.Now,since an employee can work on many projects and a project can be done by ma[详细]

2022-12-12 20:23 分类：问答