Alternative ways to write these options. You can write mysql -u “$MYSQL_ROOT” -p”$MYSQL_PASS” -e “SHOW DATABASES” If [password is] given, there must be no space between –password= or -p and the password following it. If no password option is specified, the default is to send no password. to pass empty strings as separate arguments. Your … Read more
$ mysql –version mysql Ver 14.14 Distrib 5.1.45, for apple-darwin10.2.0 (i386) using readline 6.2 $ echo ‘\s’ | mysql ————– mysql Ver 14.14 Distrib 5.1.45, for apple-darwin10.2.0 (i386) using readline 6.2 Connection id: 105730 […] Server version: 5.1.41 MySQL Community Server (GPL) […] Uptime: 11 days 4 hours 2 min 6 sec Threads: 2 Questions: … Read more
I think you’re misunderstanding what ON DELETE NO ACTION means. It does not mean to suppress the foreign-key constraint. When you delete a record that is referred to by a foreign key, InnoDB has the ability to take an automatic action to rectify the situation: it can CASCADE, meaning, delete the referring record. (This would … Read more
Joins are used to combine two related tables together. In your example, you can combine the Employee table and the Department table, like so: SELECT FNAME, LNAME, DNAME FROM EMPLOYEE INNER JOIN DEPARTMENT ON EMPLOYEE.DNO=DEPARTMENT.DNUMBER This would result in a recordset like: FNAME LNAME DNAME —– —– —– John Smith Research John Doe Administration I … Read more
If you encounter this error again after upgrading to 12.04 (or for people arriving here after googling the title of this page after upgrading to 12.04), the following worked for me: gem uninstall mysql2 gem install mysql2 This will recompile the gem using libmysqlclient18, and worked for me.
Since increments() creates an unsigned integer column, you need to define the foreign key column as unsigned integer too. Default migrations in Laravel 6+ use bigIncrements(), so you need to use unsignedBigInteger() method: $table->unsignedBigInteger(‘order_id’); https://laravel.com/docs/6.x/migrations#foreign-key-constraints For default migrations in older versions of Laravel use unsignedInteger() method: $table->unsignedInteger(‘order_id’); Or: $table->integer(‘order_id’)->unsigned(); https://laravel.com/docs/5.5/migrations#foreign-key-constraints
MySql.Data.EntityFrameworkCore vs Pomelo.EntityFrameworkCore.MySql [closed]
I do not think Nginx can be used for what you’re trying to use it for. While it can be used to proxy tcp streams or load balance them, it’s not necessarily knowledgable of the protocol and request structure within them. So to answer your question: from database sharding perspective – is it possible to … Read more
Timestamp columns are a special case. See here: By default, TIMESTAMP columns are NOT NULL, cannot contain NULL values, and assigning NULL assigns the current timestamp. For more detailed information read up on Data Type Default Values. Specifically that situation applies when not running in strict mode. If running in strict mode, inserting a NULL … Read more
Ok, so what I found is that you can make UDF functions in mysql that can do anything but need to be written in C/C++. They can be then called from triggers on updates in database and notify your application when update happened. I saw that there are some security concerns. I did not use … Read more