ɽ9-35�ˡ�array���ǻ��Ѳ�ǽ�ʱ黻�Ҥ��ޤ���
ɽ 9-35. array�黻��
| �黻�� | ���� | �� | ��� |
|---|---|---|---|
| = | ������ | ARRAY[1.1,2.1,3.1]::int[] = ARRAY[1,2,3] | t |
| <> | �������ʤ� | ARRAY[1,2,3] <> ARRAY[1,2,4] | t |
| < | ̤�� | ARRAY[1,2,3] < ARRAY[1,2,4] | t |
| > | ����礭�� | ARRAY[1,4,3] > ARRAY[1,2,4] | t |
| <= | �ʲ� | ARRAY[1,2,3] <= ARRAY[1,2,3] | t |
| >= | �ʾ� | ARRAY[1,4,3] >= ARRAY[1,4,3] | t |
| || | ����������Ϣ�� | ARRAY[1,2,3] || ARRAY[4,5,6] | {1,2,3,4,5,6} |
| || | ����������Ϣ�� | ARRAY[1,2,3] || ARRAY[[4,5,6],[7,8,9]] | {{1,2,3},{4,5,6},{7,8,9}} |
| || | ���Ǥ������Ϣ�� | 3 || ARRAY[4,5,6] | {3,4,5,6} |
| || | ��������Ǥ�Ϣ�� | ARRAY[4,5,6] || 7 | {4,5,6,7} |
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ɽ9-36�����ǻ��Ѳ�ǽ�ʴؿ����ޤ��������δؿ��λ�����ˡ����ˤĤ��Ƥ���8.10�Ȥ��Ƥ���������
ɽ 9-36. array�ؿ�
| �ؿ� | ����ͤη� | ���� | �� | ��� |
|---|---|---|---|---|
array_cat
(anyarray, anyarray)
| anyarray | 2�Ĥ������Ϣ�� | array_cat(ARRAY[1,2,3], ARRAY[4,5]) | {1,2,3,4,5} |
array_append
(anyarray, anyelement)
| anyarray | ��������������Ǥ��ɲ� | array_append(ARRAY[1,2], 3) | {1,2,3} |
array_prepend
(anyelement, anyarray)
| anyarray | �������Ƭ�����Ǥ��ɲ� | array_prepend(1, ARRAY[2,3]) | {1,2,3} |
array_dims
(anyarray)
| text | ����μ�����ƥ�����ɽ�����֤� | array_dims(ARRAY[[1,2,3], [4,5,6]]) | [1:2][1:3] |
array_lower
(anyarray, int)
| int | �����β��¤��֤� | array_lower(array_prepend(0, ARRAY[1,2,3]), 1) | 0 |
array_upper
(anyarray, int)
| int | �����ξ�¤��֤� | array_upper(ARRAY[1,2,3,4], 1) | 4 |
array_to_string
(anyarray, text)
| text | ��������Ǥ���ꤵ�줿���ڤ�ʸ������Ѥ���Ϣ�� | array_to_string(ARRAY[1, 2, 3], '~^~') | 1~^~2~^~3 |
string_to_array
(text, text)
| text[] | ʸ�������ꤵ�줿���ڤ�ʸ������Ѥ�����������Ǥ�ʬ�� | string_to_array('xx~^~yy~^~zz', '~^~') | {xx,yy,zz} |