如何基于SQL Server中当前表列的值使用与其他表不同的列值

Question

I have a table A with [agent name] and [conducted by] columns

I have an another table B with [Agent Names],[Manager] and [SDI] columns

I need a result like the table below

result table is based on table A and Table B .If the [Conducted by] field value in Table A is 0 then i need to get [manager] column value from table B,else if my [conducted by] column value in table A is 1 then i need to get [SDI] column value from table B.how can i achieve this?

Thanks in adavance

Answer 1

Try this:

SELECT
  a.agentName,
  CASE
    WHEN a.conductedBy=0 THEN b.manager
    ELSE b.sdi
  END AS conductedBy
FROM tableA AS a
JOIN tableB AS b ON a.agentName=b.agentName

or this:

SELECT
  a.agentName,
  CASE a.conductedBy
    WHEN 0 THEN b.manager
    ELSE b.sdi
  END AS conductedBy
FROM tableA AS a
JOIN tableB AS b ON a.agentName=b.agentName

only for mysql work this:

SELECT
  a.agentName,
  IF(a.conductedBy=0, b.manager, b.sdi) AS conductedBy
FROM tableA AS a
JOIN tableB AS b ON a.agentName=b.agentName

Answer 2

您可以使用case语句：

case when ConductedBy = 0 then [Manager] when ConductedBy = 1 then [SDI] end