I am implementing trigram similarity for word matching in column comum1. similarity() returns real. I have converted 0.01 to real and rounded to 2 decimal digits. Though there are rank values greater than 0.01, I get no results on screen. If I remove the WHERE condition, lots of results are available. Kindly …
Insert differences between 2 tables into 3rd table
I have total of 3 tables in my database. My Testing1 and Testing2 table have two exact columns (ItemID and ItemPath). My Testing3 have three columns (ItemID, ItemPath and Source). I’m trying to compare Testing1 with Testing2 and insert the difference to Testing3. I’m able get the the difference bu…
Right join to an incremental date table not working in SQL
I have two tables. The first is a date_incremental table just holing dates from 1900-01-01 to current in yyyy-mm-dd format. The second table has user behavior. Here are the tables in visual form: date_incremental The user table Now, I want to get a table output where no date gaps exist between the users purch…
SQL QUERY to show records of names that are recorded several times and are unique towards each other
For example, let us consider this table: In this image consists of rows of 8 where names like Mike,Glenn,Daryl,Shane and Patricia is included with their respective ages Id Name Age 1 Mike 25 2 Glenn 19 3 Glenn 19 4 Daryl 56 5 Shane 30 6 Shane 30 7 Patricia 16 Now I want to insert the type of query
SQLite: optimize query with union
This is my table definition: And this is my query + plan: So the index is used, but there is still a scan and a b-tree involved in the order by. I tried getting rid of them by adding more indexes, but I don’t get it working. Any ideas of an index which gets rid of the scan? Answer Your
Query based on JSON object values
If I have a column(lets call it students) in a PostgreSQL db in a JSON/JSONB format like such: How can I query the students who have passed? Ideally, I’d write something like SELECT (students->’student_id’) FROM table_name WHERE (students->’Pass’)=true, but that doesn’…
How would I make my SQL statement show only the first line (lowest price + total purchases)
I’ve got this SQL exercise I’m trying to complete but I can’t figure out how to specifically show one row that should contain the media type with the lowest # of purchases and purchase value. I’m completely unsure of what I should add after my ‘group by’? So this is what I …
error: its says legacy_id is an invalid identifier
if I try * it fetches all the data but when I mention any of the col names it says it’s invalid. Answer Most likely it was quoted during table creation and should be accessed as such: In Python: Double-quoted Identifiers If an object is created using a double-quoted identifier, when referenced in a quer…
Count and Group by 2 different columns SQL
I have below table and want to find out a count and group by that will show the number of times republic of ireland played a particular opponent regardless if they are the home team or away team I want something that will show like the below Thanks for help! Answer This is how I would do it — normalize
Google BigQuery: join on an join Alias
i try to perform an join on a table that is the result of an other join. But i recieve the error: Table “join_1” must be qualified with a dataset (e.g. dataset.table). I bolded the Problem. Thanks a lot in advance. How can I qualify table join_1? I edited the table, I hope that helps to understand…