I have a simple nodejs code in pipedream that sends the body email to mySQL Database. i have checked the connection to database and its working. Here is my code const mysql = require(‘mysql2/promise’);…
Tag: mariadb
Why this IF NOT EXISTS statement is not ok?
I’m trying to create a table but it keeps giving me error and I’m not able to figure out the problem even after checking the manual That’s the code: Answer I solved by using a different word from VALUE. It is already defined as keyword
Major bug in MySQL 8.x? — foreign keys
While retrieving foreign keys information from MySQL (for a code generator) I noticed this strange behavior. It looks like a major bug in MySQL 8.x. When I create a foreign key using REFERENCES the …
How to select one random id from the child table?
I am using 10.4.13-MariaDB. I have a parent table and a child table. Parent table (tasks) In interface it looks like And I have a child table (puzzles) – puzzles table – puzzles can belong only to child themes I want to get ONE random PUZZLE from EACH LEVEL. How to write a proper query? Expected result: My fiddle: https://dbfiddle.uk/?rdbms=mariadb_10.4&fiddle=7bed2a19a0f98abccbe06ba9e0ae358b
MySQL: cannot add constant field at start of SELECT. Error 1064
Using MariaDB v. 10, I try to add a custom constant as the first column of my SELECT query, before all other columns *. This results in the generic syntax error 1064. For example: If I select only some columns, it works: And it also works if I use * to select all columns, but put my constant column after
Most efficient way to delete duplicate entries from MySQL tables
We have a table (let us call it originalTbl) that has duplicate entries that we want to delete. By duplicate I mean all values other than an AUTO INCREMENT index field are the same. One way to do this is to create a new table, like the existing table (let us call it uniqueTbl), and then have a query like:
is a LOCK TABLE needed for `UPDATE tbl SET col = col + 1`?
lets say that col is 0, and 100 clients is trying to increase it by 1 at the exact same time, is the LOCK TABLE needed here? or can i just do and be sure that col becomes 100? (eg that mariadb makes sure none of them reads the same value twice~) i’m basically trying to do the equivalent of
Right syntax to use near ORDER BY when I try to delete some number of rows
When I try to delete some rows from tables (rows got from joined tables) (Ex : if I get 10 records, then need to delete first 2 records) using ORDER BY ASC and LIMIT = 2. But getting error You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right
mariadb/mysql Nested `WITH` statement causes table-not-found error
I am not sure if this is a documented limit in mariadb or a bug in its query parsing. We are porting some enormous queries from vertica to mariadb, and I have encountered cases where queries with …
Mysql group by get value base of another colum value
I have one long query return like below table Could I use group by to achieve below result Basically, i would like to to group name , and the value is based on priority without join the query itself Answer You can use row_number()