如何将连接的字符串拆分为新列

Question

我有一个包含连接字符串的列。我想将它们拆分到一个新列中。

Work Rate
Medium / High
Medium / Medium
Medium / Medium
High / Medium
Medium / Medium
Medium / Low
Medium / Low
Low / High
High / High
Medium / Medium
High / Low

我找到了类似的东西。但它不会创建列。另外，作为第二个问题，我可以从这样的查询创建一个列吗？

SELECT *,split_part("Work_Rate",'/',1) as attack_work,
split_part("Work_Rate",'/',2) AS defence_work FROM "Football";

Answer 1

您需要：

BEGIN;
ALTER TABLE  "Football" ADD COLUMN attack_work varchar;
ALTER TABLE  "Football" ADD COLUMN defence_work varchar;
COMMIT; --Or ROLLBACK; if it fails

然后：

BEGIN;
UPDATE
    "Football"
SET
    attack_work = split_part("Work_Rate",'/',1),
    defence_work = split_part("Work_Rate",'/',2);
COMMIT; --Or ROLLBACK; if it fails

如何将连接的字符串拆分为新列

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