I am trying to find the most frequent string ignoring everything after ( within it. So, how it should work. If I’ve got the strings: It should return because it’s the most frequent country here and no matter that as a string England (88) is going to pretend. Unfortunately, my query returns SQLfiddle I’ve been thinking to do it by
Tag: sqlite
Checking if a value exists in sqlite db with Go
I’m writing code to manage users in a sqlite database with Go. I’m trying to check if a username is taken, but my code is ugly. My table looks like: And I check if a username is taken with: Is there a better query I could use that would tell me if the username value exists in the table in
Add an autoincrementing ID column to an existing table with Sqlite
Using Sqlite, I want to add an auto-incrementing ID column to an existing table which had previously no ID: How to do it properly? I have this error: sqlite3.OperationalError: near “auto_increment”: syntax error Answer An SQLite table cannot modified in a significant manner using alter table once it has been created. One common popular suggestion is to create a new
“not Implemented by SQLite JDBC driver”
I have a database with User information, and I wanted to make a public static to return the database integers at any given time without having to make a void for every single one, but it’s giving me this error: And this is my code: Does someone understand what I’m doing wrong? I tried to Google things, but changing code
SELECT hex(name || age) AS X FROM Ages ORDER BY X
I am taking a Cousera course talking about SQL and there is one line of code I cannot understand. What does it mean by ‘hex(name || age)’? I know it turns the string into hexadecimal format using the …
How to check if a value is a number in SQLite
I have a column that contains numbers and other string values (like “?”, “???”, etc.) Is it possible to add an “is number” condition to the where clause in SQLite? Something like: Answer From the documentation, The typeof(X) function returns a string that indicates the datatype of the expression X: “null”, “integer”, “real”, “text”, or “blob”. You can use where
How to send plain SQL queries (and retrieve results) using scala slick 3
I am trying to make a class that has methods that can send and get data to an SQLite db using plain sql queries. This unfortunately does not work. I do not want to use the withSession implicit parts. The following error is thrown: type mismatch; found : slick.profile.SqlStreamingAction[Vector[(Int, Double, String)],(Int, Double, String),slick.dbio.Effect] required: slick.dbio.DBIOAction[(Int, Double, String),slick.dbio.NoStream,Nothing] DBops.scala Answer I
SQLite not selecting date
My SQlite database in my app stores the date in the format of yyyy-MM-dd HH:mm:ss. I want to query a transaction that happened on a certain month of a year but my code is not working : Answer After some research I discovered that for some reason I had to do some casting for it to work.
SQLite – How to perform COUNT() with a WHERE condition?
I have a products table with these fields: _id, product_name, priority and shelf_id. And I have a shelves table with these fields: _id and shelf_name. Currently, I have this SQL which returns a resultset showing the name of each shelf along with the number of products within each shelf: What I am trying to achieve is the creation of an
SQLite database – select the data between two dates?
I want to select my data by date – from a date until another date, so I have this query, But this query only return the data in ‘2014-10-09’, excluding the data in ‘2014-10-10’, unless I change the query to this below, This is not an ideal solution. How can I select the data including the data in ‘2014-10-10’? NOTE: