Bigquery 中的案例陈述

Question

SQL中这个IF语句如何用CASE语句转换

if address='US\Madison Drive' then 'ZIP1234'
elseif address='US\123 Madison Dr' then 'ZIP1234'
elseif address'US\123 Madison-Dr' then 'ZIP1234'
ELSE 'ZIP9999' END

我需要在 where 条件下使用 CASE 语句重写此语句

Select a.ID, NAME, Address, ZIP from 
table_A a left join table_B b
on a.ID = b.ID#
where {I need to put if condition mention above} 

Answer 1

如何使用 CASE 语句转换 SQL 中的此 IF 语句

case address 
  when 'US\Madison Drive' then 'ZIP1234'
  when 'US\123 Madison Dr' then 'ZIP1234'
  when 'US\123 Madison-Dr' then 'ZIP1234'
  else 'ZIP9999' 
end           

此特定示例的另一个选项

case when address in (
    'US\Madison Drive', 
    'US\123 Madison Dr', 
    'US\123 Madison-Dr') 
  then 'ZIP1234'
  else 'ZIP9999' 
end           

Answer 2

case address 
    when ('US' || CHR (92) || 'Madison Drive') then 'ZIP1234' 
    when ('US' || CHR (92) || '123 Madison Dr') then 'ZIP1234' 
    when ('US' || CHR (92) || '123 Madison-Dr') then 'ZIP1234' 
    else 'ZIP9999' end ``` 

**'\' was giving error**