一、SQL速成

结构查询语言(SQL)是用于查询关系数据库的标准语言，它包括若干关键字和一致的语法，便于数据库元件(如表、索引、字段等)的建立和操纵。

以下是一些重要的SQL快速参考，有关SQL的语法和在标准SQL上增加的特性，请查询MySQL手册。

-One, SQL Express structured query language (SQL) is the standard for querying relational database language, which includes the same number of keywords and syntax, ease of database elements (such as tables, indexes, fields, etc.) to establish and manipulation. The following are some important SQL quick reference, the SQL standard SQL syntax and added features, please consult the MySQL manual.