一、条件筛选
1、数字筛选：sql = "select * from [sheet1$] where 销售单价 > 100"
2、字符条件：sql = "select * from [sheet1$] where 物品名称 ='挡泥板'"
3、日期条件：sql = "select * from [sheet1$] where 物品名称 ='挡泥板'"
4、区间条件：sql = "select * from [sheet1$] where 出库日期 between #2005-1-4# and #2005-1-10#"
5、多个条件：用and,or连接
'sql = "select * from [sheet1$] where 出库日期 between #2005-1-4# and #2005-1-10# and 销售单价>100"
6、模糊条件：%表示任意多个字符,_(下划线)表示单个占位符
'sql = "select * from [sheet1$] where 物品名称 like '%扶手%'"
7、插入变量查询:
'sr = "挡泥板" 'sql = "select * from [sheet1$] where 物品名称 ='" & sr & "'"
8、在字符串组里：
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'sql = "select * from [sheet1$] where 物品名称 in('车衣','扶手箱')"
9、借用函数优化：
'sql = "select * from [sheet1$] where left(物品代码,3)='028'"
二、指定筛选
1、筛选全部字段:*表示全部字段
'sql = "select * from chuku"
2、筛选指定字段：在from前面列出要显示的所有字段,如果要跳过的用""""
'sql = "select """",出库日期,"""",物品代码,"""",规格,单位 from chuku"
3、筛选不重复的：distinct 字段名 筛选不重复的记录
'sql = "select distinct """",物品代码 from chuku"
4、按百分比筛选:top n percent 可以显示前百分之n的记录
'sql = "select top 30 percent * from chuku"
'对筛选的字段用函数进行进一步的处理和格式化
'sql = "select id,format(出库日期,""yyyy-mm-dd"") from chuku"
5、排序:desc降序,asc升序
'sql = "select * from chuku order by 出库日期 asc,销售单价 desc" 'sql = "select top 10 * from chuku order by 出库日期 asc,销售单价 desc" '筛选销售数量前10()
三、分组显示
group by 可以配合函数进行分组求和,分组求最大值等。
'sql = "select """","""",物品代码,"""","""","""",sum(出库数量) from chuku group by 物品代码" ' 跳过的用""""
按条件显示分组记录
'sql = "select """","""",物品代码,"""","""","""",sum(出库数量) from chuku group by 物品代码 having sum(出库数量)>=3"
以上所述是小编给大家介绍的mysql数据库中select用法小结，希望对大家有所帮助
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