mysql- 错误代码： 1064 You have an error in your SQL syntax;

<code>DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;#错误定义，标记循环结束  /* 打开光标 */  OPEN _Cur;       /* 循环执行 */      REPEAT          FETCH _Cur INTO stockNo_a;          IF NOT done THEN              BEGIN                /* 定义变量一 */                  DECLARE stockNo_b VARCHAR(6);                /* 定义光标 */                 DECLARE _CurInner CURSOR FOR                      SELECT DISTINCT stock_no FROM history_day;                OPEN _CurInner;                    REPEAT                    FETCH _CurInner INTO stockNo_b;                      IF NOT done2 THEN                        SELECT                            (                                AVG(a. CLOSE * b. CLOSE) - AVG(a. CLOSE) * AVG(b. CLOSE)                            ) / SQRT(                                (                                    AVG(a. CLOSE * a. CLOSE) - AVG(a. CLOSE) * AVG(a. CLOSE)                                ) * (                                    AVG(b. CLOSE * b. CLOSE) - AVG(b. CLOSE) * AVG(b. CLOSE)                                )                            ) INTO coefficient                        FROM                            history_day a,                            history_day b                        WHERE                            a.date = b.date                        AND a.date >= '2015-08-05'                        AND a.date <= '2015-08-11'                        AND a.stock_no = stockNo_a                        AND b.stock_no = stockNo_b;                        IF coefficient > 0.5 OR coefficient < -0.5 THEN                            INSERT INTO correlationanalysis (stock_no_f, stock_no_r, coefficient) VALUES(stockNo_a, stockNo_b, coefficient);                            COMMIT;                        END IF;                      END IF;                    UNTIL done2 END REPEAT;                    CLOSE _CurInner;                SET done2 = 0;            END        END IF;    UNTIL done END REPEAT;CLOSE _Cur;END$$</code>