Deleted the information_schema database manually

 · mysql -s -N -username -p information_schema -e 'SELECT Variable_Value FROM GLOBAL_VARIABLES WHERE Variable_Name = "datadir"' The command will select the value only from MySQL's internal information_schema database and disables the tabular output and column headers. Output on Linux [mine result]: /var/lib/mysql or. mysql select @@datadir; on MYSQL CLI. The TABLES table provides information about tables in databases.. Columns in TABLES that represent table statistics hold cached values. The information_schema_stats_expiry system variable defines the period of time before cached table statistics expire. The default is seconds (24 hours). If there are no cached statistics or statistics have expired, statistics are retrieved from storage. Extensions to SHOW Statements. INFORMATION_SCHEMA provides access to database metadata, information about the MySQL server such as the name of a database or table, the data type of a column, or access privileges. Other terms that are sometimes used for this information are data dictionary and system catalog.

You can view the full asset hierarchy within the overview tab. As an example: if you navigate to a SQL table, then you can see the schema, database, and the server the table belongs to. Asset classifications. Asset classifications identify the kind of data being represented, and are applied manually or during a scan. You could query the contents of the table as of a time before the deletion to find out what data had been lost, and, if appropriate, re-insert the lost data in the database. Here's the sample query: select * from MANUAL_TRANSACTION as of timestamp to_timestamp ('APR ', 'DD-MON-YYYY HH:MI:SS') where ' clause based on your deleted. EVENTS is a nonstandard INFORMATION_SCHEMA table.. Times in the EVENTS table are displayed using the event time zone, the current session time zone, or UTC, as described in Section , "Event Metadata".. For more information about SLAVESIDE_DISABLED and the ORIGINATOR column, see Section , "Replication of Invoked Features".

To delete a database. In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance. Expand Databases, right-click the database to delete, and then click Delete. Confirm the correct database is selected, and then click OK. Using Transact-SQL To delete a database. Connect to the Database Engine. From the Standard bar, click New Query. SELECT SUM(DATA_FREE) FROM INFORMATION_www.doorway.ruIONS WHERE TABLE_SCHEMA = 'mydb' AND TABLE_NAME = 'mytable'; For more information, see Section , “The INFORMATION_SCHEMA PARTITIONS Table”. AUTO_INCREMENT. The next AUTO_INCREMENT value. CREATE_TIME. When the table was created. UPDATE_TIME. The INFORMATION_SCHEMA database is an ANSI standard set of views we can find in SQL Server, but also MySQL. Other database systems also have either exactly such or similar database implemented. It provides the read-only access to details related to databases and their objects (tables, constraints, procedures, views) stored on the server.