我有一个表格以下列格式存储矩阵信息:
CREATE TABLE "column" (
id serial primary key,
name varchar
);
CREATE TABLE matrix (
id serial primary key,
column_id integer references "column",
"row" integer,
data varchar
);
使用样本数据:
INSERT INTO "column"(name) VALUES ('column1'), ('column2'), ('column3'), ('column4'), ('column5');
INSERT INTO matrix(column_id, "row", data) VALUES (1, 1, '1, 1'), (1, 2, '1, 2'), (1, 3, '1, 3'), (1, 4, '1, 4'), (1, 5, '1, 5'), (2, 1, '2, 1'), (2, 2, '2, 2'), (2, 3, '2, 3'), (2, 4, '2, 4'), (2, 5, '2, 5'), (3, 1, '3, 1'), (3, 2, '3, 2'), (3, 3, '3, 3'), (3, 4, '3, 4'), (3, 5, '3, 5');
以矩阵形式表示它的最有效方法是什么?
column1 | column2 | column3 | column4 | column5
-----------------------------------------------
1, 1 | 1, 2 | 1, 3 | 1, 4 | 1, 5
2, 1 | 2, 2 | 2, 3 | 2, 4 | 2, 5
3, 1 | 1, 2 | 3, 3 | 3, 4 | 3, 5