Shulou(Shulou.com)06/01 Report--

Let's talk about a concept first-what is metadata?

It starts with data storage. If you are interested, you can take a look at: https://blog.51cto.com/12042068/1898605

The storage of data is divided into two parts: one is the storage of data structure. The other is the storage of the data location.

The metadata we are talking about is the storage of data structures. It can be simply understood as the storage of the index. Including but not limited to secondary: the name of the data. The data size is fast. Permissions for the data. Information such as data location.

Remember: metadata is the information of the data. It's about the data. It's about the data. It's not real data.

The second thing we should pay attention to is the problem of garbled comments on Chinese characters after DBeaver is saved as.

You can refer to my solution and garbled past life and this life. Https://blog.51cto.com/12042068/2115021

After installing MySQL, it is very fulfilling to operate MySQL under the MySQL character interface. However, it is somewhat inconvenient to operate. Let's get to know a database connection tool. It is convenient for us to write database scripts (SQL scripting language)

We will be in the window7 environment. Explain this data connection software. DBeaver is a database software that needs the support of java language. (requires everyone to have a JDK environment)

one. Download address: https://dbeaver.jkiss.org/download/

The red part is the place where win is downloaded. Installation process (only the next step of the software under win is sufficient). What needs to be explained here is that. The first time you connect to the database, DBeaver prompts you to download and install a data driver. Just download it directly.

Introduction to the main operation interface:

The settings you will use:

Areas worthy of your attention:

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