I want to get all Titles and Scores for a Given skill Id, every skill has titles mandatorily but there may not be records in the Answer table matching the condition A.[ServiceId] = 45 in this case i still need to display all the Titles and 0 as score For this purpose i made LEFT Join and still it doesn’t
Tag: left-join
Get one record per ID
I’m trying to retrieve data from 2 tables A&B. , there are multiple data rows in B for each PrimaryKey from A. But I want to get only the first record for every ID from tableA. How can I achieve this? Answer SQL tables represent unordered sets so there is no first row. But you can get an arbitrary row
SQL Statement summarize missing employee certifications
I am trying to create a report on tables that I can’t modify and am not sure if this is even possible. Using the script below, I am trying to get a query result of: Answer You can cross join employees and certifications to generate all possible combinations, then use a subquery to check whether each tuple exists in the
Counting organizations which user has not contacted
I am new at PostgreSQL. I have the following tables created in my schema: User table: Organization table: And finally Organization_rating table: With this schema, an organization has a business type in which gives support to the user that also have that business type. After giving this support, the user can rate this organization with organization_rating. Following this logic, I
How to pull the count of occurences from 2 SQL tables
I am using python on a SQlite3 DB i created. I have the DB created and currently just using command line to try and get the sql statement correct. I have 2 tables. When I setup table two, I added this statement in the creation of my messages table, but I have no clue what, if anything, it does: What
Is there a way to return 0 if values does not exist in table using SQL Server
I have put down below a query to retrieve from four tables which are Query: The query is working well but if the Expense table has no values Expense.Invoice_No does not match with Sales_Invoice.Invoice_No, then the query above will return empty rows. But what I wish to do is that, if Expense.Invoice_No does not exists then I still want to
Select first and nth order for each client
I’m trying to display first and fifth order_id for each user. Table looks like this: I wrote something like this: But I want to see clients who made their first orders but don’t have fifths. There should be NULL, but I can’t understand how to make it. :c Answer Put the where t2.rn = 5 condition into the left join:
Joining table which may not exist with where clause
I have two tables. Let’s say they are: I’d like to make a join to get customer name, number of orders which he/she has finished and sum of money which he/she has spent in total So I’m making this SQL query: If a customer has any finished orders then it will get everything right. But if there are no orders
Conceptual explanation: why COUNT() syntax doesn’t work on SQLZoo JOIN Lesson Challenge 13?
I’ve got solutions here in stack overflow for SQLZoo Join Lesson Challenge 13 problem link: https://sqlzoo.net/wiki/The_JOIN_operation solution link: SQLzoo JOIN tutorial #13 But, before to use the solution that I found here, I was trying: But the answer is always wrong. I have a spreadsheet where I put the results Correct X Actual. link to the results I’ve got: https://docs.google.com/spreadsheets/d/1uTHfgbvuDBbPrVIaXX-i-RGny5uK1j6wJYwmTNUZ7sQ/edit#gid=0
Using left join to query and match JSON field in MySQL
Table A,field : pay_type_fk,type:json, Examples Data: [1,2,4] Table B,field : id type : bigint Examples Data: primary key SQL I use: Only pay can be found_ For the first record in the type table, I think we can query all of them with group_ CONCAT Answer If I follow you correctly, you can join on JSON_CONTAINS(): That said, a better