1. Обучение
    2. /
  2. Курса
    3. /
  3. Reporting in SQL
Connected

упражнение

String functions

There are a number of string functions that can be used to alter strings. A description of a few of these functions are shown below:

  • The LOWER(fieldName) function changes the case of all characters in fieldName to lower case.
  • The INITCAP(fieldName) function changes the case of all characters in fieldName to proper case.
  • The LEFT(fieldName,N) function returns the left N characters of the string fieldName.
  • The SUBSTRING(fieldName from S for N) returns N characters starting from position S of the string fieldName. Note that both from S and for N are optional.

Инструкции 1/4

undefined XP
  • 1

    Update the field country_altered to output country in all lower-case.

  • 2

    Update the field country_altered to output country in proper-case.

  • 3

    Update the field country_altered to output the left 3 characters of country.

  • 4

    Update the field country_altered to output all characters starting with the 7th character of country.