MySQL, like most databases, allows you to add comments to each table and column. If used, this is useful for understanding database schema and meaning of data elements. In this tutorial, I would like to show you
Now using workbench I'm not sure how to get that simple, but effective view on the tables. Does anyone know, using new workbench, how i can get a visual on all my tables in mysql database as they are growing and table size is changing??
To display the table data it is best to use HTML, which upon filling in some data on the page invokes a PHP script which will update the MySQL table. To populate a new database table with data you will first need an HTML page which will collect that data from the user. The ...
# mysql -u root -p Create a sample database named sample_db. mysql> CREATE DATABASE sample_db; Switch to the sample_db database. mysql> USE sample_db; Create a new table named states. mysql> CREATE TABLE states ( id BIGINT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(255), country VARC...
Fast way to update key distribution statistics MySQL query optimizer uses the distribution statistics of keys in the table to create an optimized query plan. If the key distribution statistics has not been analyzed for a long time, the query optimizer has to work with out-of-date key distributi...
Use the command described in the tutorial to find complete CREATE TABLE SQLs for MySQL tables. Execute the command below from any MySQL client. SHOW CREATE TABLE <table name>; Replace <table name> with your table name A much faster and simpler approach of doing the sa...
WHERE table_schema='[schema_name]' ORDER BY data_free DESC;Copy The example tables are not heavily fragmented. However, usingoptimize tablehelps free up some space from thetest_table. Optimize MySQL Tables via Command Line There are multiple ways to optimize tables by defragmentation. However, ...
Upon installation, MySQL creates arootuser account which you can use to manage your database. This user has full privileges over the MySQL server, meaning it has complete control over every database, table, user, and so on. Because of this, it’s best to avoid using this account ...
MySQL closes an unused table and removes it from the table cache under the following circumstances: When the cache is full and a thread tries to open a table that is not in the cache. When the cache contains more than table_open_cache entries and a table in the cache is no longer be...
All the rows in a table have the same structure. OK, yes, you can do weird stuff with JSON or XML data but they're inherently slower than doing the job properly. Relational Databases work on "sets" of rows - you ask the database to "find" a set of rows and then to "do" so...