#Navicat for mysql trial#

In today's blog we learned just a few of the many ways to use the MySQL INFORMATION_SCHEMA to obtain metadata information about a variety of objects within an MySQL instance, form the databases to tables, columns, indexes, and more. In that case you may want to add the database name as well: You can view all indexes in all schemas by simply removing the where clause. Here are the results in Navicat for the sakila database: One use for the INFORMATION_SCHEMA.STATISTICS table is to see indexes for all tables within a specific schema: If there are no cached statistics or statistics have expired, statistics are retrieved from storage engines when querying table statistics columns. As such, these expire after 24 hours, by default.

The INFORMATION_SCHEMA.STATISTICS table contains cached values. You can even use information_schema.tables to list the size of every database in a MySQL instance! ORDER BY (data_length + index_length) DESC With a few tweaks, you can list the size of every table in every database: You can also query information_schema.tables to get the size of a table: Here is the above query and results in Navicat:

#Navicat for mysql trial#

We offer a 14-day fully functional FREE trial of Navicat. The information_schema.tables table contains metadata about, you guessed it, tables! Beside the table names, you can also retrieve their type (base table or view) and engine: Download a free 14 days trial of Navicat for MySQL and try the latest features in Navicat 16. In today's blog, we'll explore a few practical uses for the INFORMATION_SCHEMA, as demonstrated using Navicat Premium. It contains several read-only tables that you can query to obtain the information that you are looking for. There is one INFORMATION_SCHEMA within each MySQL instance. MySQL's provides database metadata in a special schema called INFORMATION_SCHEMA. In relational databases, database metadata, such as information about the MySQL server, the name of a database or table, the data type of a column, or access privileges are stored in the data dictionary and/or system catalog.