.TH schema "" "" "/rdb Command"
.PC "Print a table's schema"
\fBschema \fItableorlist ...\fR
.PP
.II "table^print schema"
.II "data base^print schema"
The command
.B schema
prints the schema, or a data-base dictionary, for each
.IR tableorlist .
.PP
Other data-base systems require that you define a schema
prior to creating a table.
In
.BR /rdb ,
you can derive a schema from an existing table or tables.
.SH Example
The following command combines the schemas for tables
.B inventory
and
.BR maillist .
The example pipes the concatenated schema through the command
.B justify
to ``pretty up'' the output:
.DM
	schema inventory maillist | justify
.DE
.PP
This produces the following:
.DM
Table           Field   Name
---------       -----   -----------  
inventory       1       Item         
inventory       2       Amount       
inventory       3       Cost         
inventory       4       Value        
inventory       5       Description  
maillist        1       Number       
maillist        2       Name         
maillist        3       Company      
maillist        4       Street       
maillist        5       City         
maillist        6       State        
maillist        7       ZIP          
maillist        8       Phone        
.DE
.PP
Because
.B schema
is a shell script, you can modify it to give widths of columns,
data types, and so on.
.SH "See Also"
.B
datatype,
precision,
width
.R
.SO schema