SQL中的变量->错误PLS-00103：遇到符号“ SELECT”

Question

如何在select中迭代变量？我收到错误消息

    DECLARE
    ESTACION_ID NUMBER(6) :=3;
    BEGIN
          SELECT 
        100*TOTAL_TAX_AMB1/(SELECT COUNT(*) FROM ITV2 WHERE ITV2.C_RESULTADO=1 AND ITV2.C_ESTACION_ID= ESTACION_ID ) AS TAXIS_Y_AMBULANCIAS_PRIMERA
                             ...
    END;

Answer 1

您可以使用USING子句绑定变量

DECLARE
    ESTACION_ID NUMBER(6) :=3;
    v_sql   varchar2(32767);
BEGIN
    v_sql   := 'SELECT 100*TOTAL_TAX_AMB1/(SELECT COUNT(*) FROM ITV2 WHERE ITV2.C_RESULTADO=1 AND ITV2.C_ESTACION_ID= :1) AS TAXIS_Y_AMBULANCIAS_PRIMERA
             ...'
    EXECUTE IMMEDIATE v_sql INTO ... USING ESTACION_ID;
END;