mysql - 如何用 1000 行示例数据填充表？

Question

下表:

CREATE TABLE Persons (
    ID int NOT NULL,
    ModifiedDate datetime,
    FirstName varchar(50),
    LastName varchar(50),
    EMail varchar(30),
    PhoneNumber varchar(15),
    PRIMARY KEY (ID)
);

Answer 1

您可以编写这样的查询:

INSERT INTO Persons(ModifiedDate, FirstName, LastName, EMail, PhoneNumber)
SELECT
    CURRENT_TIMESTAMP - INTERVAL FLOOR(RAND()* 31536000) SECOND, -- random datetime up to -1 year
    CHAR(FLOOR(RAND() * 26)+ ASCII('A')),  -- random character between A-Z
    CHAR(FLOOR(RAND() * 26)+ ASCII('A')),
    CHAR(FLOOR(RAND() * 26)+ ASCII('a')),  -- random character between a-z
    CHAR(FLOOR(RAND() * 10)+ ASCII('0'))   -- random character between 0-9
FROM any_table_with_1000_rows
LIMIT 1000

可以使用任何具有 1000 行的表。如果没有，您可以将具有 n 行的表与其自身连接以获得 n² 行。