如何在MySQL中添加多个CASE语句？

Question

SELECT 
CASE 
WHEN (LEFT(`Data`,2))=10 THEN  'Barang 1'
WHEN (LEFT(`Data`,2))=20 THEN  'Barang 2'
WHEN (LEFT(`Data`,2))=30 THEN  'Barang 3'
WHEN (LEFT(`Data`,2))=40 THEN  'Barang 4'
WHEN (LEFT(`Data`,2))=50 THEN  'Barang 5'
ELSE 'none'
END AS `ProdName`

CASE
WHEN (MID(`Data`,3,2))=01 THEN 'Januari'
WHEN (MID(`Data`,3,2))=02 THEN 'Februari'
WHEN (MID(`Data`,3,2))=03 THEN 'Maret'
WHEN (MID(`Data`,3,2))=04 THEN 'April'
WHEN (MID(`Data`,3,2))=05 THEN 'Mei'
WHEN (MID(`Data`,3,2))=06 THEN 'Juni'
WHEN (MID(`Data`,3,2))=07 THEN 'Juli'
WHEN (MID(`Data`,3,2))=08 THEN 'Agustus'
WHEN (MID(`Data`,3,2))=09 THEN 'September'
WHEN (MID(`Data`,3,2))=10 THEN 'Oktober'
WHEN (MID(`Data`,3,2))=11 THEN 'November'
WHEN (MID(`Data`,3,2))=12 THEN 'Desember'
ELSE 'none'
END AS `ProdTime`

FROM `LOGGING BARCODE`

我收到了错误：

1064 - 您的SQL语法出错;检查与您的MySQL服务器版本相对应的手册，以便在正确的语法附近使用（CAS（Data，3,2））= 01那么＆＃39; Januari＆＃39;什么时候（MID（Data，3,2））= 02那么＆＃39; Fe＆＃39;在第11行

我需要解析Data但是会​​发生错误 谢谢你的帮助