YEAR()
函数从日期列中提取年份,然后使用 GROUP BY
子句按年分组进行查询。YEAR()
函数从日期列中提取年份,然后使用 GROUP BY
子句按年分组进行查询。php,$sql = "SELECT * FROM users WHERE age > 18";,$result = $conn>query($sql);,
`,,这段代码会查询
users` 表中所有年龄大于 18 的用户。SELECT * FROM Table1 INNER JOIN Table2 ON Table1.id = Table2.foreign_id;
LIKE
运算符用于在 WHERE
子句中搜索列中的指定模式。Powered By Z-BlogPHP 1.7.3
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