WITH子句的递归查询
WITH子句的递归查询 无 WITH RPL AS(SELECT FId,FNumber,FName,FManagerIdFROM T_PersonWHERE FManagerId IS NOT NULL)SELECT FId,FNumber,FName,FManagerId FROM RPL WITH RPL(FId,FNumber,FName,FManagerId) AS(SELECT FOOT.FId,ROOT.FNumber,ROOT.FName,RO
WITH子句的递归查询WITH RPL AS ( SELECT FId,FNumber,FName,FManagerId FROM T_Person WHERE FManagerId IS NOT NULL ) SELECT FId,FNumber,FName,FManagerId FROM RPL
WITH RPL(FId,FNumber,FName,FManagerId) AS ( SELECT FOOT.FId,ROOT.FNumber,ROOT.FName,ROOT.FManagerId FROM T_Person ROOT WHERE ROOT.FId='00001' UNION ALL SELECT CHILD.FId,CHILD.FNumber,CHILD.FName,CHILE.FManagerId FROM RPL PARENT,T_Person CHILD WHERE PARENT.FId=CHILD.FManagerId ) SELECT DISTINCT FId,FNumber,FName,FManagerId FROM RPL ORDER BY FManageId,FId,FNumber,FName

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The recursion depth of C++ functions is limited, and exceeding this limit will result in a stack overflow error. The limit value varies between systems and compilers, but is usually between 1,000 and 10,000. Solutions include: 1. Tail recursion optimization; 2. Tail call; 3. Iterative implementation.

Yes, C++ Lambda expressions can support recursion by using std::function: Use std::function to capture a reference to a Lambda expression. With a captured reference, a Lambda expression can call itself recursively.

Download the latest version of 12306 ticket booking app. It is a travel ticket purchasing software that everyone is very satisfied with. It is very convenient to go wherever you want. There are many ticket sources provided in the software. You only need to pass real-name authentication to purchase tickets online. All users You can easily buy travel tickets and air tickets and enjoy different discounts. You can also start booking reservations in advance to grab tickets. You can book hotels or special car transfers. With it, you can go where you want to go and buy tickets with one click. Traveling is simpler and more convenient, making everyone's travel experience more comfortable. Now the editor details it online Provides 12306 users with a way to view historical ticket purchase records. 1. Open Railway 12306, click My in the lower right corner, and click My Order 2. Click Paid on the order page. 3. On the paid page

How to check my academic qualifications on Xuexin.com? You can check your academic qualifications on Xuexin.com, but many users don’t know how to check their academic qualifications on Xuexin.com. Next, the editor brings you a graphic tutorial on how to check your academic qualifications on Xuexin.com. Interested users come and take a look! Xuexin.com usage tutorial: How to check your academic qualifications on Xuexin.com 1. Xuexin.com entrance: https://www.chsi.com.cn/ 2. Website query: Step 1: Click on the Xuexin.com address above to enter the homepage Click [Education Query]; Step 2: On the latest webpage, click [Query] as shown by the arrow in the figure below; Step 3: Then click [Login Academic Credit File] on the new page; Step 4: On the login page Enter the information and click [Login];

The recursive algorithm solves structured problems through function self-calling. The advantage is that it is simple and easy to understand, but the disadvantage is that it is less efficient and may cause stack overflow. The non-recursive algorithm avoids recursion by explicitly managing the stack data structure. The advantage is that it is more efficient and avoids the stack. Overflow, the disadvantage is that the code may be more complex. The choice of recursive or non-recursive depends on the problem and the specific constraints of the implementation.

MySQL and PL/SQL are two different database management systems, representing the characteristics of relational databases and procedural languages respectively. This article will compare the similarities and differences between MySQL and PL/SQL, with specific code examples to illustrate. MySQL is a popular relational database management system that uses Structured Query Language (SQL) to manage and operate databases. PL/SQL is a procedural language unique to Oracle database and is used to write database objects such as stored procedures, triggers and functions. same

A recursive function is a technique that calls itself repeatedly to solve a problem in string processing. It requires a termination condition to prevent infinite recursion. Recursion is widely used in operations such as string reversal and palindrome checking.

Tail recursion optimization (TRO) improves the efficiency of certain recursive calls. It converts tail-recursive calls into jump instructions and saves the context state in registers instead of on the stack, thereby eliminating extra calls and return operations to the stack and improving algorithm efficiency. Using TRO, we can optimize tail recursive functions (such as factorial calculations). By replacing the tail recursive call with a goto statement, the compiler will convert the goto jump into TRO and optimize the execution of the recursive algorithm.
