(The four most classic operations of the database are adding, deleting, repairing, and searching. When managing a lot of data, using the database can help us quickly locate the data that needs to be managed at that time. For example, if we want to implement a search function with the database now, we can quickly find the data we need in N pieces of data by using only one search condition and one database statement, If you don't use the database, it will be very difficult to search, and the efficiency will be greatly reduced. Therefore, it is a clear choice to use the database when managing a lot of data. The database used in Android development is SQLite. It is a lightweight database, very small, portable, efficient, and reliable. Embedded devices are very suitable for using SQLite databases because of the limitations of hardware conditions. This document includes the following annexes:)
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