g_md5sum(G;S;O;X)

Returns the MD5 hash of data for each group within a given column.

Syntax

g_md5sum(G;S;O;X)

Input

Argument Type Description
G any A space- or comma-separated list of column names

Rows are in the same group if their values for all of the columns listed in G are the same.

If G is omitted, all rows are considered to be in the same group.

If any of the columns listed in G contain N/A, the N/A value is considered a valid grouping value.
S integer The name of a column in which every row evaluates to a 1 or 0, which determines whether or not that row is selected to be included in the calculation

If S is omitted, all rows will be considered by the function (subject to any prior row selections).

If any of the values in S are neither 1 nor 0, an error is returned.
O integer A space- or comma-separated list of column names that determine the row order within a particular group

If O is omitted, the order is the current display order of the table.

If any of the values in O are N/A, an error is returned.
X any simple type A column name

Return Value

For every row in each group defined by G (and for those rows where S=1, if specified), g_md5sum returns a text value representing the 32-digit hexadecimal number that corresponds to the MD5 hash (checksum) of the group in the order specified by O (or by the current display order of the table, if O is omitted).

Sample Usage

<base table="pub.doc.samples.ref.func.g_func_time_series_sample_usage"/>
<willbe name="g_md5sum_1" value="g_md5sum(state;include;order;value)"/>
<willbe name="g_md5sum_2" value="g_md5sum(state city;include;order;value)"/>