Mysql 或null。这不是受支持的用例。即使你找到了一个有效的解决方案，它也可能在将来的任何时候崩溃，你可以保留这些碎片。 insert into mytable (colA) select 'foo' from bar where <some condit

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或null。这不是受支持的用例。即使你找到了一个有效的解决方案，它也可能在将来的任何时候崩溃，你可以保留这些碎片。

insert into mytable (colA)
select 'foo' from bar
where <some condition>;
select LAST_INSERT_ID();

@previousId := LAST_INSERT_ID();
insert into mytable (colA)
select 'foo' from bar
where <some condition>;
select if(LAST_INSERT_ID() != @previousId, LAST_INSERT_ID(), null);

DELIMITER $$
CREATE TRIGGER MyTable_AI AFTER INSERT ON MyTable FOR EACH ROW
BEGIN
    INSERT INTO MyTable_InsertLog (myTableId, ident) VALUES (NEW.myTableId, COALESCE(@tag, CONNECTION_ID()));
END $$
DELIMITER ;

CREATE TABLE MyTable_InsertLog (
    myTableId BIGINT UNSIGNED PRIMARY KEY NOT NULL REFERENCES MyTable (myTableId),
    tag CHAR(32) NOT NULL
);

SET @tag=MD5('A');
INSERT INTO MyTable SELECT NULL,colA FROM Foo WHERE colA='whatever';
SELECT myTableId FROM MyTable_InsertLog WHERE tag=@tag;
DELETE FROM MyTable_InsertLog WHERE tag=@tag;

insert into mytable (colA)
select 'foo' from bar
where <some condition>;

IF ROW_COUNT() > 0
    select LAST_INSERT_ID();
    -- ...use selected last_insert_id for other updates/inserts...
END IF;

CREATE TABLE foo (id INTEGER PRIMARY KEY AUTO_INCREMENT, value INTEGER NOT NULL);
CREATE TABLE bar (id INTEGER PRIMARY KEY AUTO_INCREMENT, fooref INTEGER NOT NULL);
INSERT INTO foo(value) VALUES ('1');
INSERT INTO bar(fooref) VALUES (LAST_INSERT_ID());

[ deletia ]

SELECT LAST_INSERT_ID(NULL);

INSERT INTO my_table (my_column) SELECT NULL WHERE LAST_INSERT_ID(NULL);

SET @@last_insert_id := NULL;

select IF(ROW_COUNT() > 0, LAST_INSERT_ID(), 0);