MySQL 报错nextval does not exist
时间: 2023-07-31 22:05:19 浏览: 134
MySQL does not have a "nextval" function like some other databases (such as PostgreSQL). The "nextval" function is used in PostgreSQL to get the next value from a sequence object.
In MySQL, you can use the "AUTO_INCREMENT" attribute on a column to automatically generate unique values for that column when new rows are inserted. For example, you can define a table with an "id" column as follows:
```sql
CREATE TABLE mytable (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(255)
);
```
Then when you insert a new row without specifying a value for the "id" column, MySQL will automatically generate a unique value for it:
```sql
INSERT INTO mytable (name) VALUES ('John');
```
The "id" column will be automatically incremented for each new row inserted into the table. So, you don't need to use the "nextval" function in MySQL.