table1 has 3 columns in my database: id, category, timestamp. I need to query the newest 3 rows from each category: now I need to add one more condition: select only from the partitions which have at least 3 rows. how to add this condition? Answer here is another way:
Tag: mysql
How to prevent duplicate entry key when update
Problem explain I won’t update the last primary key of the 3 primary key concatenate. But the problem is sometimes the first and second primary key was the same for multiple records. And in this case, when I set my new value I have a duplicate entry key even I use sub-request to avoid that problem. Some…
SQL/Presto: how to choose rows if the values match with another table’s
I have 2 tables: table 1: table 2: I want to add a column for table 2 such that if cnt in table1 for a task is the same as cnt2 for a task in table2. If there is no match, mark it as ‘no match’ desired result: I started from a query like the one below to pick tasks
Checking multiple columns for one value with greater than or equal (>=)
Let’s say i’m having a table like this: I wish to check if any of col1,col2,col3,col4 are greater than or equal 10 The idea was smth like Is there any more optimized way? I thought that I could use IN, but as don’t have any clue how to use >= in it. Answer Assuming none of the values are …
How to return T2 name based on data from T1?
T1 game T2 heroes T1 IDC = ID from T2 I need to return all heroes that have anything except null in POWER or in HP with LTIME != -1 Query should return ID and NAME from T2 for that heroes. In this example query should return: 236 MAX I tried this: Answer Your WHERE condition in the subquery is
How can i make this Complex query for SQL database
I have a database that looks like this: Player (UserId, Mail, Password, Username, LastLogin) Leaderboard (UserId*, Level, Kills, Deaths) Match (MatchId, HostId*, ServerIp, StartTime, Team1Points, Team2Points) MatchStats (UserId*, MatchId*, Kills, Deaths) Weapons (IdWeapon, Name, Damage, FireRate, ReloadTime, …
“IS NOT NULL” not producing the required results in mySQL
I am trying to build a report based of my table. Here is my table: Following is the SQL query to get desired results. I am looking to exclude entries which have all null values and following is my syntax but it is not working and produces the same results. Kindly help here or share a post that can help.
how can I join multiple columns on two table in sql
I have two table like below how can I get all the information in table test_info and the name of the buyer AND the name of seller from the test_user table in the same statement? would just give me a seller or buyer but i would like to get the result for both Answer You must join 2 copies of
How do I write a condition within an SQL Select statement
I have a rather long SQL query to pull some values out my database written inside a stored procedure. I am passing an IN parameter called pupiltype which will either =0 or =1. If the pupiltype value=1, I need the line a line in my query to be: but if the pupiltype value is 0, it needs to be: I
SQL Like Operator not working as expected in PHP
I am trying to fetch all the data from the database with a certain content tags value. If I run the code below, it only returns the row with id 1, even though the word tag is part of the tags value in both rows. I also added %or% operator but it is fetching the exact row. When I search