2. insert 插入 插入语句中 with as 要放在insert的后面 insert into STUDENT With t1 as (select * from STUDENT) select t1.stuid+10 as stuid, t1.stuname || '1' as stuname, t1.stusex, t1.stuclass from t1 where t1.stuid = '5' 1. 2. 3. 4. 5. 6. 7. 8. 9. 3. delete删除 ...
我们将创建一个名为employees的表,它包含员工的基本信息。 CREATETABLEemployees(idINTAUTO_INCREMENTPRIMARYKEY,nameVARCHAR(100),departmentVARCHAR(50),salaryDECIMAL(10,2));-- 插入一些示例数据INSERTINTOemployees(name,department,salary)VALUES('Alice','HR',60000.00),('Bob','Engineering',80000.00),('Charlie...
);--分类数据INSERTINTOcategory(cid,cname)VALUES('c001','家电');INSERTINTOcategory(cid,cname)VALUES('c002','鞋服');INSERTINTOcategory(cid,cname)VALUES('c003','化妆品');INSERTINTOcategory(cid,cname)VALUES('c004','汽车');--商品数据INSERTINTOproducts(pid, pname,price,flag,category_id)VALUES(...
=null&& resp.getCode() ==0&& CollectionUtils.isNotEmpty(resp.getData());// 有新用户数才insertif(check) {for(OsDayCountVO item : resp.getData()) {OsDayCountpo=BeanConvertUtils.convert(item, OsDayCount.class); osDayCountMapper.insert(po);// 前一天 osStatCount = 前一天 statCount + 前...
WITH…AS语句的语法如下: WITH cte_name AS ( SELECT ... ) SELECT ... FROM cte_name ... cte_name是临时表的名称,括号内是子查询的SQL语句,在WITH…AS语句之后,可以使用SELECT、INSERT、UPDATE等语句对临时表进行操作。 WITH…AS的优点 1、提高代码可读性:将复杂的子查询封装成临时表,使得代码更加清晰易...
( cid ) ); -- 分类数据 INSERT INTO category(cid,cname) VALUES('c001','家电'); INSERT INTO category(cid,cname) VALUES('c002','鞋服'); INSERT INTO category(cid,cname) VALUES('c003','化妆品'); INSERT INTO category(cid,cname) VALUES('c004','汽车'); -- 商品数据 INSERT INTO ...
INSERT INTO products (pid, pname,price,flag,category_id) VALUES('p009','大宝',200,'1','c003');然后举例说明With as的用法： Plain Text 复制代码 9 1 2 -- 先查询一下小米电视机和格力空调在products中的信息 SELECT * FROM products WHERE pname IN ('小米电视机', '格力空调' );那如果...
当然可以,MySQL 中的 WITH 子句(也称为公用表表达式 CTE, Common Table Expressions)可以与 INSERT 语句结合使用。这种写法在复杂查询中特别有用,因为它允许你在一个查询块中定义临时结果集,然后可以在后续的 INSERT 操作中使用这些结果集。 以下是一个示例,展示了如何使用 WITH 子句与 INSERT 语句: 示例场景 假设...
–INSERT INTO EmployeeTable VALUES (1, ‘a’, NULL), (2, ‘b’, 1), (3, ‘c’, 1), (4, ‘d’, 2), (5, ‘e’, 2), (6, ‘f’, 5), (7, ‘g’, 6);WITH cte (col...
localhost:ytt>INSERT y1 (r1,log_date) -> WITH recursive tmp (a, b) AS -> (SELECT -> 1, -> '2021-04-20' -> UNION -> ALL -> SELECT -> ROUND(RAND() * 10), -> b - INTERVAL ROUND(RAND() * 1000) DAY -> FROM -> tmp ...