IG2 Glossary - U4 Advanced programming TB C9 &C10

an SQL command that counts the number of records (rows) in which the field (column) matches a specified condition; used with SELECT

Answer explanation

计数

a classification of how data is stored and displayed, and of which operations can be performed on the stored value

Answer explanation

数据类型

a persistent structured collection of data that allows people to extract information in a way that meets their needs

Answer explanation

数据库

a single item of data in a record, stored in a database table

Answer explanation

字段

an SQL command that identifies the table to use full-duplex data that can be sent in both directions at the same time (simultaneously)

Answer explanation

来自

an SQL command that sorts the results from a query by a given column, either alphabetically or numerically

Answer explanation

以……为序

a field in a database that uniquely identifies a record

Answer explanation

主键

a field in a database that uniquely identifies a record

Answer explanation

记录

a SQL command that fetches specified fields (columns) from a table

Answer explanation

筛选

a database that contains only one table

Answer explanation

单表数据库