I’m struggling on how can I fix, for example, 5 random rows of my table in SQL. But I need to be able to repeatable retrieve the same 5 rows every time I run the code with a given seed. I tried to use But I didn’t get the same sample each time that I run the code. Any idea
Tag: sql
How to do query with multiple condition from 2 table?
I wanna pick cities from worldcity by these conditions: the population of the city exceeds the population of the most populous city in the Filipina. (Meaning: for example city X is the city in the Filipina with the most population. We want to list the cities with a population greater than city X), AND there i…
How to structure my database model for a simple web application and organize my SQL data model
I am working on a web app. I have a question about the SQL parts. I am currently creating a food rating interface. The user should be able to login and then rate the food. Currently I use a custom database (users) for the login page. I also use a separate database (review) for the reviews. my current database…
sql – how to join on a column that is less than another join key
I have two tables as below. What I’m trying to do is to join A and B base on date and id, to get the value from B. The problem is, I want to join using add_month(A.Date, -1) = B.month (find the data in table B from one month earlier). If that’s not available, I want to join using two
How to use SQL IN operator with CASE in select query where clause
I have the above sample T-SQL code and in the IN operator of the where clause I want to use multiple values like IN (1,2,3,4) but also I want to use the CASE operator such that I can pass different values to the IN operator depending on the value of @AreaType parameter, how can I modify the code above to
postgres column allow space to column while making alias name
python code to make query from postgres table error: I wants to add space to alias name of column thats why i have written my code like this. Plese check how can i fix it. Answer Postgres follows the SQL standard and uses double quotes, not backticks, to escape database object names (such as column or table n…
The Sum of people that have same age in SQL?
I’m taking a SQL class and I need help with a question. I have the following table on a phpmyadmin server with a total of 100 patients I’m told to find the sum of people that have same age using SQL. I wrote this query: but it returns 100 as a result and when I did this query and found
How to select columns after inner join
Once I have joined two dataframes by a specific column I then want to select specific columns from this table – how can I do this? I have tried the following: However I get the following error: near “SELECT”: syntax error Answer Instead of a second select, use the first one. For example, thi…
Select records in one table and specific matching records from the other
I have three tables, two of which are relevant for this question. Users, Things, User_to_thing Users User_to_thing I’m trying to create a query where I can select all the active users in the users table and have a column where I can see the status for “thing 3” from the User_to_thing table w…
Group by the specific day, month, and year
I have a table as follow, now I use the group by date and it only group my data based on the year. I want to group the data based on the specific day, month, and year. Do you know how we can do that? Answer Use: Check for more info