mysql:使用COALESCE以逗号分隔的格式选择多个行值
这是mssql版本:mysql:使用COALESCE以逗号分隔的格式选择多个行值,mysql,sql-server,Mysql,Sql Server,这是mssql版本: PROCEDURE [dbo].[GetBranchIds] @WebsiteId INT, @BranchIds VARCHAR(1000) OUTPUT AS BEGIN SELECT @BranchIds = COALESCE(@BranchIds + ',', '') + CAST(BranchId AS VARCHAR) FROM Dealer WITH (NOLOCK) WHERE WebsiteId = @Website
PROCEDURE [dbo].[GetBranchIds]
@WebsiteId INT,
@BranchIds VARCHAR(1000) OUTPUT
AS
BEGIN
SELECT @BranchIds = COALESCE(@BranchIds + ',', '') + CAST(BranchId AS VARCHAR)
FROM Dealer WITH (NOLOCK)
WHERE WebsiteId = @WebsiteId
END
经销商表有以下列:
branchid,网站ID。在该SP的输出变量中,我们得到如下分支ID:
126512651265,5,5,5
我正在将其转换为mysql,我尝试了:
PROCEDURE `GetBranchIds`(
v_WebsiteId int,
out BranchIds varchar(1000))
BEGIN
set @BranchIds := null;
select @BranchIds := (CONCAT(COALESCE(CONCAT(BranchIds,','), ''),BranchId))
from dealer
where websiteid = v_WebsiteId;
END
但我在不同的行中得到输出,即第1行中的1265,第2行中的1265,依此类推。我希望以逗号分隔的格式输出,如126512651265,5,5,5。我在mysql版本中做错了什么?尝试使用group_concat()函数:
我认为应该使用group_concat()函数
select group_concat(BranchId) INTO @BranchIds
from dealer where websiteid = v_WebsiteId;