classic-super comparison table. Moved a number of sections on installing, working with databases, and (un)safety into newly created top-level sections. 2.2.1 22 Dec 2005 PV Corrected statement on SS thread usage section. Added a subsec- tion on DISTINCT. Changed “More about NULLs” subsection some- what. Renamed “Safety measures” to “Preventing data loss”. The Security subsection has been moved elsewhere. Extended Backup

FLOAT data type has an approximate precision of 7 digits after the decimal point. To ensure the safety of storage, rely on 6 digits. 3.2.2. DOUBLE PRECISION The DOUBLE PRECISION data type is stored

approximate precision of 7 decimal digits after the decimal point (24 binary digits). To ensure the safety of storage, rely on 6 decimal digits of precision. The syntax FLOAT(bin_prec) was introduced in