https://www.yuque.com/docs/share/fd325fc6-b695-4050-a642-ce407717398b?# 《数据库》
    https://www.yuque.com/docs/share/c4b574d8-1e1e-4ab4-ba18-8ca15e06ed50?# 《MySQL的介绍》
    https://www.yuque.com/docs/share/fdb55583-3f48-4b11-aa29-6434031a5791?# 《DQL语言》
    https://www.yuque.com/docs/share/82406c1e-ce0b-47e5-9267-062d62a56a22?# 《DML语言》
    https://www.yuque.com/docs/share/afc96182-7a49-402b-8f86-ff1c4fd1a1ee?# 《DDL语言》
    https://www.yuque.com/docs/share/ac283416-3f85-4a0a-8577-13bb37068a4e?# 《TCL语言》
    https://www.yuque.com/docs/share/1127a20b-8222-4e51-bc6c-a0908685f583?# 《其他》[

    ](https://www.yuque.com/niyubifang/sanqo3)