sql，-创建数据库，CREATE DATABASE IF NOT EXISTS mydatabase;，，-使用数据库，USE mydatabase;，，-预处理指令示例，SET @query = "SELECT * FROM users";，PREPARE stmt FROM @query;，EXECUTE stmt;，DEALLOCATE PREPARE stmt;，``sql，-创建数据库，CREATE DATABASE IF NOT EXISTS mydatabase;，，-使用数据库，USE mydatabase;，，-预处理指令示例，SET @query = "SELECT * FROM users";，PREPARE stmt FROM @query;，EXECUTE stmt;，DEALLOCATE PREPARE stmt;，``Powered By Z-BlogPHP 1.7.3