A database is a warehouse for storing data. Users can add, query, update and delete data in files. However, C language and database are two different things. The relationship between them is that C language can be used to develop database management software, and it can also be used to operate the database by SQL statements through C language.

C language is the most common computer programming language, which can not only play the role of high-level programming language, but also has the advantages of assembly language, so it has its own unique characteristics compared with other programming languages. It is embodied in the following three aspects:

First, universality. The operating range of C language directly determines its advantages and disadvantages. There are 34 kinds of operators in C language, so the operation range is incomparable to many other languages, and the expression forms of its operation results are also very rich. In addition, C language contains many kinds of data structures such as character type and pointer type, so it can also cope with larger data structure operations. ?

Second, simplicity. Nine control statements and 32 keywords are the basic features of C language, which makes C language widely applicable in computer application programming. It can not only be suitable for programmers to operate and improve their work efficiency, but also support advanced programming and avoid the complexity of language switching.

Extended data

Database architecture

1, inner layer: closest to the actual storage volume, that is, the actual storage mode of related data.

2. Outer layer: the way closest to users, that is, individual users view data.

3. Conceptual layer: an indirect layer between the two.

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