How do you output the number of records in a table in ModelBuilder? I can open the table and see how many records are there but I want to tabulate the number of records available from a number of tables.
You can use the Get Count tool from the Data Management toolbox, which
Returns the total number of rows for a feature class, table, or layer
You could use the Summary Statistics tool. The input table would be that which you want to count the records of. The statistics could be any field, but let's say ObjectID/OID. The statistic type would be COUNT. The output table could be whatever you like, possibly even stored in_memory.
Once the tool is run, the output table will have one record, and the value stored in the FREQUENCY field will the the number of records in the Input Table.
Have a look at the tool help for some more info, script examples etc.