条件IF在Power Query的高级编辑器中

Question

我有一个名为的字段field,我想看看它是否为null,但我在查询中出错,我的代码是这样的:

let
    Condition= Excel.CurrentWorkbook(){[Name="test_table"]}[Content],
    field= Condition{0}[fieldColumn],
    query1="select * from students",
    if field <> null then query1=query1 & " where id = '"& field &"',
    exec= Oracle.Database("TESTING",[Query=query1])
in
    exec

但我在这种情况下得到错误,你是否发现了错误？我有Expression.SyntaxError: Token Identifier expected.

Answer 1

您需要将if行分配给变量.每个M行都需要从作业开始:

let
Condition= Excel.CurrentWorkbook(){[Name="test_table"]}[Content],
field= Condition{0}[fieldColumn],
query1="select * from students",
query2 = if field <> null then query1 & " some stuff" else " some other stuff",
exec= Oracle.Database("TESTING",[Query=query2])
in
exec

在query2中,您可以构建select语句.我简化了它,因为你也与双引号有冲突.