如何从二叉树表中获取具有父子关系的数据而不进行递归？这是表结构。
id member_id member_parent_id
1 1 9999 ROOT
7 7 1 LEFT
8 8 1 RIGHT
9 9 7 LEFT
10 10 7 RIGHT
11 11 8 LEFT
12 12 8 RIGHT
13 13 9 LEFT
14 14 9 RIGHT
15 15 10 LEFT
16 16 10 RIGHT
17 17 11 LEFT
18 18 11 RIGHT
19 19 12 LEFT
20 20 12 RIGHT
21 21 13 LEFT
22 22 13 RIGHT
23 23 14 LEFT
24 24 14 RIGHT
25 25 15 LEFT
26 26 15 RIGHT
27 27 16 LEFT
28 28 16 RIGHT
29 29 17 LEFT
30 30 17 RIGHT
31 31 18 LEFT
32 32 18 RIGHT
33 33 19 LEFT
34 34 19 RIGHT
35 35 20 LEFT
36 36 20 RIGHT
37 37 21 LEFT
38 38 21 RIGHT
39 39 22 LEFT
40 40 22 RIGHT
41 41 23 LEFT
42 42 23 RIGHT
43 43 24 LEFT
44 44 24 RIGHT
45 45 25 LEFT
46 46 25 RIGHT
47 47 26 LEFT
48 48 26 RIGHT
49 49 27 LEFT
50 50 27 RIGHT
51 51 28 LEFT
52 52 28 RIGHT
53 53 29 LEFT
54 54 29 RIGHT
55 55 30 LEFT
56 56 30 RIGHT
57 57 31 LEFT
58 58 31 RIGHT
59 59 32 LEFT
60 60 32 RIGHT
61 61 33 LEFT
62 62 33 RIGHT
63 63 34 LEFT
64 64 34 RIGHT
65 65 35 LEFT
66 66 35 RIGHT
67 67 36 LEFT
68 68 36 RIGHT
69 69 37 LEFT
70 70 69 LEFT
71 71 70 LEFT
72 72 71 LEFT
73 73 72 LEFT
74 74 73 LEFT
75 75 74 LEFT
76 76 74 RIGHT
77 77 76 RIGHT
78 78 77 LEFT
79 79 77 RIGHT
80 80 79 RIGHT
81 81 80 RIGHT
82 82 81 RIGHT
83 83 82 RIGHT
84 84 83 RIGHT
85 85 84 RIGHT
86 86 85 RIGHT
87 87 86 RIGHT
88 88 87 RIGHT
89 89 88 RIGHT
90 90 88 LEFT
91 91 75 LEFT
92 92 91 LEFT
93 93 92 LEFT
94 94 93 LEFT
95 95 94 LEFT
96 96 95 LEFT
97 97 96 RIGHT
98 98 97 LEFT
99 99 98 LEFT
100 100 99 LEFT
101 101 100 LEFT
102 102 101 LEFT
103 103 102 LEFT
104 104 103 LEFT
105 105 104 LEFT
106 106 105 LEFT
107 107 105 RIGHT
108 108 107 RIGHT
109 109 106 LEFT
110 110 109 LEFT
111 111 110 LEFT
112 112 111 LEFT
113 113 111 RIGHT
114 114 68 RIGHT
115 115 114 RIGHT
116 116 115 LEFT
答案 0 :(得分：0)
您需要使用简单的JOIN。例如：
SELECT
child.member_id _ch_mid,
parent.member_id _p_mid
FROM
tbl child LEFT JOIN tbl parent
ON(child.parent_member_id = parent.member_id)