Index_O

O

object mode, 263

OBJECT variables , 336338

ODBC ( Open Database Connectivity), 9, 272273

ODBC connections, 9, 16

ODBC drivers, 16

ODBC functions, 265

ONE DATATBASE option, 302

Open Database Connectivity. See ODBC

open source software, 35

operating systems, 58. See also Linux systems; Windows systems

operators

arithmetic, 338, 128, 132136

comparison, 339

concatenation, 339

logical, 339

numeric, 132136

PHP, 338341

precedence levels, 339341

using WHERE clause with, 128

OPTIMIZE command, 309

OPTIMIZE TABLE command, 307

OR operator, 128, 133134

ORDER BY clause, 98, 135138, 176183

ordering data, 176177, 181183