mysql - How do I write cursor which is passed to other sql query? -

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i have 1 select statement gives me following result

masterid   date 123        2012-10-15 00:00:00.000 124        2012-12-03 00:00:00.000 453        2012-01-07 00:00:00.000

(output having 1999 rows)

now need pass output 1 scalar value function gives takes parameters like

mycalculationfunction (@masterid,@date,@previousdate)

i want pass above values mycalculationfunction can select function , see values each masterid

also need provide previousdate there parameter.

so please me create cursor can use.

in sql server 2012:

select  mycalculationfunction                 (                 masterid,                 [date],                 lag([date]) on (order [date])                 )    mytable m order         [date]

in earlier versions:

select  mycalculationfunction                 (                 masterid,                 [date],                 (                 select  top 1                         [date]                    mytable mi                   mi.[date] < m.[date]                 order                         mi.[date] desc                 )                 )    mytable m order         [date]

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