EXITWHENcondition; EXIT WHEN语句使用EXIT语句条件代替条件语句 if-then 退出一样 示例: DECLAREa number(2):=10;BEGIN-- while loop executionWHILEa<20LOOP dbms_output.put_line('value of a: '||a);a:=a+1;-- terminate the loop using the exit when statementEXITWHENa>15;ENDLOOP;END;/ 当上述...
PL/SQL中EXIT语句的语法如下- EXIT; 1. EXIT - 示例 DECLARE a number(2) := 10; BEGIN -- while loop execution WHILE a < 20 LOOP dbms_output.put_line ('value of a: ' || a); a := a + 1; IF a > 15 THEN -- terminate the loop using the exit statement EXIT; END IF; END L...
在LOOP语句内部使用IF-THEN语法判断condition条件是否成立,如果成立,则执行EXIT退出循环,此时程序执行流程就会跳转到statement 3 中。 3.使用EXTI-WHEN退出循环 PL/SQL提供了EXIT WHEN语句来终止一个循环,该语句与EXIT的不同在于可以在WHEN关键字的后面指定一个循环执行的条件,通常是一个比较表达式或者是一个函数或变量...
The EXIT statement can be used to terminate the body of the loop before the actual ending of the loop by providing some conditions to this statement. The exit statement generally uses boolean expressions as the condition statement but it is optional as the use of loop label with it. Additiona...
exit [label] [when boolean_expression]In this syntax:The label is the loop label of the current loop where the exit is in or the loop label of the outer loop. Depending on the label, the exit statement will terminate the corresponding loop. If you don’t use the label, the exit ...
EXIT WHEN emp_cursor%NOTFOUND; -- -- Test whether or not the employee gets a commission -- IF v_comm IS NOT NULL AND v_comm > 0 THEN DBMS_OUTPUT.PUT_LINE(v_empno || ' ' || TO_CHAR(v_comm,'$99999.99')); ELSE DBMS_OUTPUT.PUT_LINE(v_empno || ' ' || 'Non-commission')...
EXIT WHEN v_i > v_m -1;ENDLOOP; IF v_i >0THEN v_n:= v_n +1; DBMS_OUTPUT.PUT_LINE('第'||v_n||'个素数是'||v_m);ENDIF; v_m:= v_m +2;ENDLOOP;END; 总的来说。PL/SQL的控制结构也是由一般的顺序、分支、循环三个方面的语句来控制其逻辑顺序的。通过上述的实例,我们基本上了...
EXIT 语句用于终止执行 PL/SQL 代码块中的循环。 调用 可以在 PL/SQL 过程、函数或匿名块中的 FOR、LOOP 或 WHILE 语句中嵌入此语句。 授权 调用EXIT 语句不需要任何特权。但是,此语句的授权标识必须拥有调用 FOR、LOOP 或 WHILE 语句中嵌入的 SQL 语句所必需的特权。
exit(0); }else{ fprintf(stdout,"Opened database successfully\n"); }/*Create SQL statement*/sql="CREATE TABLE COMPANY("\"ID INT PRIMARY KEY NOT NULL,"\"NAME TEXT NOT NULL,"\"AGE INT NOT NULL,"\"ADDRESS CHAR(50),"\"SALARY REAL );";/*Execute SQL statement*/rc= sqlite3_exec(db...
在之后,Sql的操作中,只支持这一种,prepare_statement。 我们看一下代码: User id: <?php $mysqli = new mysqli("localhost","root","root","zoobar"); if(mysqli_connect_errno()){ printf("connect failed: %s\n",mysqli_connect_error()); exit(); } #$username = "lily"; $sid = $...