培训
Table.FirstN
Table.FirstN(table as table, countOrCondition as any) as table
根据 countOrCondition
的值,返回 table
表的第一行:
- 如果
countOrCondition
是数字,则返回多个行(从顶部开始)。 - 如果
countOrCondition
是条件,则返回满足条件的行,直到某一行不满足条件为止。
查找表的前两行。
使用情况
Table.FirstN(
Table.FromRecords({
[CustomerID = 1, Name = "Bob", Phone = "123-4567"],
[CustomerID = 2, Name = "Jim", Phone = "987-6543"],
[CustomerID = 3, Name = "Paul", Phone = "543-7890"]
}),
2
)
输出
Table.FromRecords({
[CustomerID = 1, Name = "Bob", Phone = "123-4567"],
[CustomerID = 2, Name = "Jim", Phone = "987-6543"]
})
查找表中 [a] > 0 的前几行。
使用情况
Table.FirstN(
Table.FromRecords({
[a = 1, b = 2],
[a = 3, b = 4],
[a = -5, b = -6]
}),
each [a] > 0
)
输出
Table.FromRecords({
[a = 1, b = 2],
[a = 3, b = 4]
})