DELETE FROM customerinfo WHERE CustomerID NOT in (SELECT CustomerID FROM salesinfo ) SELECT * FROM customerinfo WHERE CustomerID NOT in (SELECT CustomerID FROM salesinfo ) SELECT * FROM customerinfo LEFT JOIN salesinfoON customerinfo.Custo delete from customerinfo where customerid not in (select customerid from salesinfo ) SELECT * FROM customerinfo WHERE CustomerID NOT in (SELECT CustomerID FROM salesinfo ) SELECT * FROM customerinfo LEFT JOIN salesinfoON customerinfo.CustomerID=salesinfo.
CustomerID WHERE salesinfo.CustomerID IS NULL SELECT Name, Phone FROM client UNION SELECT Name, BirthDate FROM author UNION SELECT Name, Supplier FROM product BEGIN;INSERT INTO salesinfo SET CustomerID=14;UPDATE inventory SET Quantity=11 WHERE item='book';COMMIT;LOCK TABLE inventory WRITE SELECT Quantity FROM inventory WHEREItem='book';...
UPDATE inventory SET Quantity=11 WHEREItem='book';UNLOCK TABLES MySQL（Linux）
MySQL 9.6.0是面向Linux平台的2026年创新版本，核心架构迎来重大革新。其将外键约束与级联操作从InnoDB引擎层上移至SQL层，确保所有数据变更均被完整记录至Binlog，彻底解决了CDC（变更数据捕获）与主从复制中的数据不一致难题。此外，该版本引入container_aware启动选项以原生适配容器环境，并对审计日志进行了组件化重构，为追求极致数据一致性与云原生体验的开发者提供了全新选择。
下载CREATE TABLE customerinfo (CustomerID INT NOT NULL ,PRIMARY KEY ( CustomerID )) TYPE = INNODB;CREATE TABLE salesinfo (SalesID INT NOT NULL,CustomerID INT NOT NULL,PRIMARY KEY(CustomerID, SalesID),FOREIGN KEY (CustomerID) REFERENCES customerinfo (CustomerID) ON DELETECASCADE) TYPE = INNODB;SELECT * FROM order WHERE YEAR(OrderDate)＜2001;SELECT * FROM order WHERE OrderDate＜"2001-01-01";SELECT * FROM inventory WHERE Amount/7＜24;SELECT * FROM inventory WHERE Amount＜24*7;