Table.FirstN

返回指定的前几个计数行。

Syntax

Table.FirstN(
    table as table,
    countOrCondition as any
) as table

Remarks

返回表 table 的前几行，具体取决于 countOrCondition 的值:

• 如果 countOrCondition 为数字，则将返回多行(从顶部开始)。
• 如果 countOrCondition 是条件，将返回满足此条件的行，直到行不满足条件为止。

Examples

Example #1

查找表的前两行。

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
)

Result:

Table.FromRecords({
    [CustomerID = 1, Name = "Bob", Phone = "123-4567"],
    [CustomerID = 2, Name = "Jim", Phone = "987-6543"]
})

Example #2

查找表中 [a] > 0 的前几行。

Table.FirstN(
    Table.FromRecords({
        [a = 1, b = 2],
        [a = 3, b = 4],
        [a = -5, b = -6]
    }),
    each [a] > 0
)

Result:

Table.FromRecords({
    [a = 1, b = 2],
    [a = 3, b = 4]
})

Category

Table.Row operations