关联查询优化 数据准备
#分类
CREATE TABLE IF NOT EXISTS type(
id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
card INT(10) UNSIGNED NOT NULL,
PRIMARY KEY ( id )
);#图书
CREATE TABLE IF NOT EXISTS book(bookid INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,cardINT(10…
Caused by: org.yaml.snakeyaml.scanner.ScannerException: while scanning for the next token
found character that cannot start any token. (Do not use for indentation)in reader, line 10, column 13:active: spring.active^查看是否勾选