MySQL 8.0 delivers support for indexes in descending order. Values in such an index are arranged in descending order, and we scan it forward. Before 8.0, when a user create a descending index, we created an ascending index and scanned it backwards. One benefit is that forward index scans ar...
Here is the entire thing in PHP: $query = "SELECT * FROM pictures WHERE count>=0 AND CONCAT('_','login','pic')!='diracleo_11' ORDER BY rating/count DESC LIMIT 0, 1"; $result = mysql_fetch_assoc(mysql_query($query));
For more information, see Use DMS to log on to an ApsaraDB RDS for MySQL instance. On the SQL Console tab, execute the following statement to view the sizes of data files and identify the data files that contain...
MySqlClient.MySqlConnection cannot be cast to [B]MySQL.Data.MySqlClient.MySqlConnection. [C#] How to make the Console Process delay [C#] Oracle.DataAccess issue - Unhandled exception of type System.TypeInitializationException occured in mscorlib.dll [C#] Regex - Best Validation of Domain? [C#]...
(MySQL) .NET pdf viewer .pdb files in production environment? 'An operation was attempted on a nonexistent network connection' error 'bootstrap' is not a valid script name. The name must end in '.js'. 'Cannot implicitly convert 'System.TimeSpan' to 'System.DateTime' 'DayOfWeek' is n...
Because of the above reason, MariaDB offers backward compatibility if you plan to switch from MySQL to MariaDB. Brief history of MySQL MySQL is a Swedish company. The name of the parent company that created this DB is MySQL AB. The first version of the software was launched in May 1995....
Typescript Mysql query builder Powerful SQL query builder with lots of compile time errors to hint what is wrong. Some examples include: Fully type checked, it is very hard to use wrong property names or types. Fully checks that all used tables are actually part of the query. Protects again...
There is a need to provide physical security like locking the server rooms and having security teams monitor every physical access to the server room. Physical hardware requires a lot of regular maintenance and there is a need to have a proper disaster recovery plan in place, like backing up ...
IN (expr, ..., expr) For functions (custom functions): CONCAT (expr1, expr2) IF expr1 == NULL, RETURN expr2 ELSE IF expr2 == null, RETURN expr1 ELSE RETURN expr1 + expr2 If both expr1 and expr2 are NULL, NULL is returned. Otherwise...
Reading mysql slow query log from mysqld.slow.log Count: 2 Time=182.50s (365s) Lock=0.00s (0s) Rows=1503.0 (3006), debian-sys-maint[debian-sys-maint]@localhost SELECT CONCAT('S', TABLE_SCHEMA, 'S', TABLE_NAME, 'S' ) FROM information_schema.TABLES WHERE ENGINE='S' Count: 62 Ti...