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如何InsertIntoOnConflictWithaWhereClause?

Insert Into On Conflict With a Where Clause”改写为“在冲突时插入,并添加Where子句”的方式是使用INSERT INTO语句的ON CONFLICT子句以及WHERE子句。

以下是一个示例:

-- 建立一个示例表
CREATE TABLE example_table (
    id SERIAL PRIMARY KEY,
    name TEXT,
    age INT
);

-- 值列表
INSERT INTO example_table (name, age)
VALUES ('张三', 25), ('李四', 32), ('王五', 28);

-- 当有冲突时,更新现有行
INSERT INTO example_table (id, name, age)
VALUES (3, '小六', 18)
ON CONFLICT (id)
DO UPDATE SET
    name = EXCLUDED.name,
    age = EXCLUDED.age
WHERE example_table.age > 20;

该示例向名为example_table的表中插入值列表。当发生冲突时,将更新现有行。WHERE子句将仅针对age大于20的行进行更新。

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