CREATE CURSOR tt (f1 n(1), f2 n(1), f3 n(1))
INSERT INTO tt VALUES (1, 0, 4)
INSERT INTO tt VALUES (0, 0, 5)
INSERT INTO tt VALUES (2, 1, 6)
INSERT INTO tt VALUES (0, 2, 0)
INSERT INTO tt VALUES (3, 3, 0)
FOR lnj = 1 TO FCOUNT()
myzd = FIELD(lnj)
BLANK FIELDS (myzd) FOR &myzd = 0
ENDFOR
BROWSE
* 对I型数据无效