The number Which means
6.50.201 SQL Server 6.5 RTM
6.50.213 SQL Server 6.5 with Service Pack 1
6.50.240 SQL Server 6.5 with Service Pack 2
6.50.258 SQL Server 6.5 with Service Pack 3
6.50.281 SQL Server 6.5 with Service Pack 4
6.50.415 SQL Server 6.5 with Service Pack 5
6.50.416 SQL Server 6.5 with Service Pack 5a
7.00.623 SQL Server 7.0 / MSDE 1.0 RTM
7.00.699 SQL Server 7.0 SP1
7.00.842 SQL Server 7.0 SP2
7.00.961 SQL Server 7.0 SP3
7.00.1063 SQL Server 7.0 SP4
8.00.194 SQL Server 2000 RTM
8.00.384 SQL Server 2000 SP1
8.00.534 SQL Server 2000 SP2
8.00.760 SQL Server 2000 SP3

Table 1 Know Your Versions. Use the command-line tool called OSQL.EXE in Enterprise Manager to decipher version and edition numbers of your SQL Server.