The primary filegroup contains the primary data file and any other files not specifically assigned to another filegroup 主文件组包含主数据文件和任何没有明确分配给其他文件组的其他文件。
The following example shows the page numbers in a database that has a 4 - mb primary data file and a 1 - mb secondary data file 下例显示了包含4 - mb主数据文件和1 - mb次要数据文件的数据库中的页码。
One of the system pages stored in both the primary data file and the first log file is a database boot page that contains information about the attributes of the database 有一个存储在主数据文件和第一个日志文件中的系统页是包含数据库属性信息的数据库引导页。
A cursor that can reflect data modifications made to underlying data by other users while the cursor is open . updates , deletes , and inserts made by other users are reflected in the sensitive cursor 每个sql server数据库至少有一个主数据文件，并且可以有多个辅助数据文件来存放不适合存放在主数据文件中的数据。
