Functions commonly used to intercept strings in SQL Server

Read Catalogue

• • 1.LEFT (character_expression, integer_expression)
  • 2.RIGHT (character_expression, integer_expression)
  • 3.SUBSTRING (character_expression, start, length)

In SQL Server we often need to intercept strings, this article will introduce the commonly used interception string function;

Back to top SQL Server the usual functions of intercepting strings

1.LEFT (character_expression, integer_expression)

Function Description: Left (' source string ', ' to intercept the leftmost number of characters ')

Returns the specified number of characters starting from the left of the string

Select Left (' sql_server_2008 ', 4);

return Result: Sql_

2.RIGHT (character_expression, integer_expression)

Function Description: Right (' source string ', ' to intercept the rightmost number of characters ')

Returns the integer_expression character of the specified number from the right in the string

Select Right (' sql_server_2008 ', 4);

Results returned: 2008

3.SUBSTRING (character_expression, start, length)

Function Description: SUBSTRING (' source string ', ' intercept start position (with character at that position ') ', ' intercept length ')

Returns part of a character, binary, text, or image expression

Select SUBSTRING (' sql_server_2008 ', 5, 6);

return Result: Server

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Functions commonly used to intercept strings in SQL Server