Mysql 插入表格选择&;追加一列
请看我的查询:Mysql 插入表格选择&;追加一列,mysql,sql,sqlite,Mysql,Sql,Sqlite,请看我的查询: INSERT INTO sessions (userId, workstationId, duration, actionType) SELECT userId, workstationId, duration FROM activeSessions WHERE workstationId = ? select语句包含的数据不足,无法推送到会话中。我还想插入一个actionType(作为一个参数(?)。也就是说,我需要在select语句结果的右侧附加一列
INSERT INTO sessions (userId, workstationId, duration, actionType)
SELECT userId, workstationId, duration
FROM activeSessions
WHERE workstationId = ?
select语句包含的数据不足,无法推送到
会话中。我还想插入一个actionType(作为一个参数(?
)。也就是说,我需要在select语句结果的右侧附加一列,以使其生效。这是如何完成的?您可以在mysql select中使用伪值:
INSERT INTO sessions (userId, workstationId, duration, actionType)
SELECT userId, workstationId, duration, 'actionType' as actionType
FROM activeSessions
WHERE workstationId = ?
对于不同的参数,也可以在选择查询中使用select
INSERT INTO sessions (userId, workstationId, duration, actionType)
SELECT userId, workstationId, duration,
(select id from actionTypeTable where id = ?) as actionType
FROM activeSessions
WHERE workstationId = ?
假设查询驻留在过程中,则可以添加这些参数
INSERT INTO sessions (userId, workstationId, duration, actionType)
SELECT userId, workstationId, duration, @actionType
FROM activeSessions
WHERE workstationId = @workstationId
相同的actionType,还是不同?@jarlh每次都不同。我希望这是一个参数。op希望不同的actionType值作为参数。谢谢!一旦时间限制过了,我会接受。我想我可以将它设置为参数?@jarlh如果它可以是伪数据,它也可以是一个参数