How to show in the cells with NULL values the corresponding values from the above rows?

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My data Table contains the shown below table:

RT	val	dt
RT1       	995	2015-09-09
RT2       	243	NULL
RT3       	662	2015-09-09
RT1       	NULL	NULL
RT1       	NULL	NULL
RT3       	662	2015-09-09
RT3       	NULL	NULL

SELECT Statement is:

SELECT * FROM [dbo].[Table_2]

I Want all the cells with NULL values to show the corresponding values from the above rows as shown below:

RT	val	dt
RT1       	995	9/9/2015
RT2       	243	NULL
RT3       	662	9/9/2015
RT1       	995	9/9/2015
RT1       	995	9/9/2015
RT3       	662	9/9/2015
RT3       	662	9/9/2015

How can we acheive this?

Thanks.

Posted 10-Sep-15 2:54am

ZohaibRazaTheDProgrammer

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Member 11973939 · Answer 1 · 2015-09-10T03:21:00

You need to put this code in to proC ( pre Compiler for SQL C - Embedded SQL like Oracle proC)

EXEC SQL
BEGIN
int j;
for (int i = 1; i<=table_2.size; i++) {
SELECT RT, val, dt INTO varRT[i], varval[i], vardt[i] from [dbo].[Table_2];
}

for (i = 1; i<=table_2.size - 1; i++) {
for (j = i+1; table_2.size; j++) {
if (varval[j] == NULL) varval[j] = varval[i];
if (vardt[j] == NULL ) vardt[j] = vardt[i];
}
}

END EXEC