Rdb: Ruby-Nachbau der MWC /rdb-Werkzeuge

man/datatype.man

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+.TH datatype "" "" "/rdb Command"
+.PC "Display the data type of each column selected"
+\fBdatatype [ \-l ] [ \fIcolumn ... \fB]  < \fItable\fR
+.PP
+.II "data type"
+.II "type of data"
+The command
+.B datatype
+displays the type of data contained in each
+.IR column .
+If you do not name a
+.I column
+on the command line,
+.B datatype
+calculates and displays all of
+.IR table 's
+columns.
+.SH Options
+The \fB\-l\fR option tells
+.B datatype
+to print the entire contents of
+.IR table ,
+in addition to information about each
+.IR column .
+.SH Code
+.IP \fB\-1\fR
+Character strings with nonnumeric data.
+.IP \fB0\fR
+Integer number.
+.IP \fB1,2...\fR
+Floating-point number (number of digits to the right of the decimal).
+.SH Example
+The following shows a sample output of
+.BR datatype :
+.DM
+Int     Char    Float2  Float4
+---     ----    ------  ------
+1       a       1.2     1.1234
+745     zzzz    8.54    12.3
+---     ----    ------  ------
+  0       -1         2       4
+.DE
+.PP
+Note that the
+.I Int
+column has only integers in it (code 0), the
+.I Char
+column has characters in it (code -1), and the two
+.I Float
+columns have different precisions (positive numbers codes).
+Note that the float precision is the maximum.
+.SH "See Also"
+.B
+ascii, chr, dbdict
+.R