我有这样的表product:
source_item_id source_rev_id
----------------------------
111 a_01_tz
111 b_01_tz
111 c_01_tz
222 e_02_tz
222 f_02_tz
222 g_01_tz
333 h_03_tz
444 g_04_tz
现在我想要这种格式的输出:
source_item_id source_rev_id target_rev_id
--------------------------------------------
111 a_01_tz AAA
111 b_01_tz AAB
111 c_01_tz AAC
222 e_02_tz AAA
222 f_02_tz AAB
222 g_01_tz AAC
333 h_03_tz AAA
444 g_04_tz AAA
444 l_04_tz AAB
首先source_item_id,可以有多个source_rev_id.
请在查询中提供帮助.谢谢.