MySQL explains how it would process the statement, including information about how tables are joined and in which order. For information about using EXPLAIN to obtain execution plan information, see Section 8.8.2, “EXPLAIN Output Format”. 当...
The 'do-while' loop can be implemented (in C) as: inti=5; do { printf("%d",i); i--; }while(i>=0); where 'i' is the loop variable. Answer and Explanation:1 Both for loop and while loop can run multiple statements in successive repetition efficiently. ...
CREATE DEFINER=`root`@`localhost` PROCEDURE `generateBigDataUser`(IN num INT) BEGIN #Routine body goes here... #申明变量i,默认为1 DECLARE i INT DEFAULT 1; #当i小于传入的参数时执行循环插入 WHILE i <= num DO INSERT INTO `big_data_user_memory`(`user_id`, `user_name`, `age`, `gen...
Using index : 发生了索引覆盖 , 查询时在索引树上取到了需要查询的数据,不需要再进行回行操作。 Using join buffer : 使用了连接缓存,Block Nested Loop,连接算法是块嵌套循环连接;Batched Key Access,连接算法是批量索引连接。 Using where : 表示 MySQL 服务器从存储引擎收到查询数据,再进行 “后过滤”(Post...
SUCCESS: RETURN 0 FAIL: RETURN -200 while表达式 while 条件表达式 do 逻辑体; end while; LOOP表达式 LOOP... END LOOP;例: OPEN c1; ins_loop: LOOP FETCH c1 INTO v_dept, v_deptname, v_admdept; IF at_end = 1 THEN LEAVEins_loop; --中断循环 ELSEIF v_dept = 'D11' THEN ITERATEins...
Explain array in java. Explain the difference between while loop and for loop? Give an example for the while loop and the for loop. Write the following code #pragma warning(disable: 4996) int getNum(void) { /* the array is 121 bytes in size; we'll see in a later lecture how we ...
Under certain conditions the plan shown when using EXPLAIN PLAN can be different from the plan shown using V$SQL_PLAN. For example, when the SQL statement contains bind variables the plan shown from using EXPLAIN PLAN ignores the bind variable values while the plan shown in V$SQL_PLAN takes ...
Creating a menu using while loop Creating a Self Extracting Exe in C# Creating a wrapper for C++ DLL Creating a zip file using encoded string Creating an endless loop that does not freeze a windows form application. creating an hyperlink text in a message body of email sent in c# Creating...
while (true){ // An infinite loop! } // Do-while loops are like while loops, except they always run at least once. var input; do { input = getInput(); } while (!isValid(input)) // The `for` loop is the same as C++ and Java: // initialisation; continue condition; iteration...
C++ - Loop C++ - do-While Loop C++ - Control Statements C++ - Tokens C++ - Jump Statements C++ - Expressions C++ - Constants C++ - Character Set C++ - Iteration Statements C++ - I/O Statements C++ - String C++ - Manipulators C++ Operator C++ - Input/Output Operator C++ - Operator Over...