SQL – Update multiple records in one query
Try either multi-table update syntax Here is SQLFiddle demo or conditional update Here is SQLFiddle demo
MySQL
PHP Connection failed: SQLSTATE[HY000] [2002] Connection refused
I found the reason why the connection was not working, it was because the connection was trying to connect to port 8888, when it needed to connect to port 8889. This fixed the problem, although changing the server name to localhost still gives the error. Connection failed: SQLSTATE[HY000] [2002] No such file or directory But … Read more
MySQL: Access denied for user ‘test’@’localhost’ (using password: YES) except root user
I am facing problem with mysql non root/admin user, I am following the below steps for creating user and its privileges, correct me if i am doing wrong, i am installing mysql on RHEL 5.7 64bit, packages are mentioned below, once i done the rpm install we are creating mysql db using mysql_install_db, then starting the mysql service then using mysql_upgrade also we … Read more
Install mysql-python (Windows)
You’re going to want to add Python to your Path Environment Variable in this way. Go to: My Computer System Properties Advance System Settings Under the “Advanced” tab click the button that says “Environment Variables” Then under System Variables you are going to want to add / change the following variables: PYTHONPATH and Path. Here is a paste … Read more
What does SQL Select symbol || mean?
|| represents string concatenation. Unfortunately, string concatenation is not completely portable across all sql dialects: ansi sql: || (infix operator) mysql: concat ( vararg function ). caution: || means ‘logical or’ (It’s configurable, however; thanks to @hvd for pointing that out) oracle: || (infix operator), concat ( caution: function of arity 2 only ! ) postgres: || (infix operator) sql server: + (infix operator), concat ( vararg function ) sqlite: || (infix operator) hopefully the confusion is complete … Read more
How do I quickly rename a MySQL database (change schema name)?
For InnoDB, the following seems to work: create the new empty database, then rename each table in turn into the new database: You will need to adjust the permissions after that. For scripting in a shell, you can use either of the following: OR Notes: There is no space between the option -p and the password. If your … Read more
Your password does not satisfy the current policy requirements
Because of your password. You can see password validate configuration metrics using the following query in MySQL client: The output should be something like that : then you can set the password policy level lower, for example: Check the MySQL Documentation.
MySQL ERROR 1045 (28000): Access denied for user ‘bill’@’localhost’ (using password: YES)
You probably have an anonymous user ”@’localhost’ or ”@’127.0.0.1′. As per the manual: When multiple matches are possible, the server must determine which of them to use. It resolves this issue as follows: (…) When a client attempts to connect, the server looks through the rows [of table mysql.user] in sorted order. The server uses the first row that matches the … Read more
#1273 – Unknown collation: ‘utf8mb4_unicode_520_ci’
You can solve this by finding in your .sql file, and swapping it with
PHP Connection failed: SQLSTATE[HY000] [2002] Connection refused
I found the reason why the connection was not working, it was because the connection was trying to connect to port 8888, when it needed to connect to port 8889. This fixed the problem, although changing the server name to localhost still gives the error. Connection failed: SQLSTATE[HY000] [2002] No such file or directory But … Read more