When i run SELECT CHAR(128,129,130,131,132,133,134,135,136,137); I got 0x80818283848586878889 istead of Çüéâäàåçêë. Does anybody know why? I’m using charset utf8mb4. When I run show variables like ‘%char%’; I got I’m using MySQL version 8.0.26 Answer The output charset is “DOS West European” Use this query it will display the text in charset “DOS West European”
Tag: mysql
Why doesn’t SET and CONVERT work for updating a table in MYSQL
I have the following code, with the column SaleDate in a datetime format, and I am trying to update it in the table to a date datatype instead and I’ve tried both cast and convert, but neither modifies the table, does anyone know what’s wrong? Answer You need to ALTER the table structure for that: This will try to convert
savepoint in sql
Can I rollback to a savepoint ( which was done before a commit ) in SQL ? Answer You can use the ROLLBACK TO SAVEPOINT statement only in the transaction. In MySQL documentation (https://dev.mysql.com/doc/refman/8.0/en/savepoint.html) you find: All savepoints of the current transaction are deleted if you execute a COMMIT, or a ROLLBACK that does not name a savepoint. So the
Bigquery – How to filter records with certain condition
I’m trying to write SQL (in BigQuery) the following in order to get a result that satisfies the following conditions. for ex: my table contains the following data I want to filter out records where it contains only value as “p” from the table. The expected result would be I have tried with the following query but it returns other
SQL – updating column based on next row value
I have a table, and the requirement is to update column ‘val’ based on the value in the column ‘val’ in next row (ordered by by id). Table is shown below : I’m able get the select query to get the next value, however the update query is not working. Here is the select query (working fine): Here is the
SQL: How to COUNT the number of keys that appear in a certain number of rows
I have the following two SQL tables dog and toy: dog id gender 1 2 2 2 3 2 4 1 toy toy_id dog_id 1 1 1 2 2 1 2 2 We want to find out how many female dogs have a certain 0 toys, 1 toy, 2 toys… A value of 2 in the gender column indicates the
Can I connect a openCart project with mobile app? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last year. Improve this question my English doesn’t well, I am sorry I have a open Cart project this project have own database, and I have mobile app for the same
How do I reset a MySQL column in a table every year?
I have a column named lv_casual in a table called tbl_employees. I need to reset the column to 0 at a specific date every year. Answer You can use MySQL event schedule. Providing an example below. You have to enable the schedular first Then create the event Check MySQL document for creating event
MySQL Joining multiple tables with where clause result is too slow
Let’s say I have the following structure of tables; and I want a result of; So I used the following query; I still have other tables that are connected to table1. The problem is the result is too slow even though there are only three results. I’m not that good at databases maybe I’m doing it wrong. Answer First of
How to make a SELECT MAX(id) inside UPDATE?
I’m starting in Mysql and I’m trying to find a way to select the maximum id inside update. This is what I tried but it doesn’t work. Answer Use ORDER BY and LIMIT.