'_' is for one letter : Regular Expressions « String Functions « SQL Server / T-SQL

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SQL Server / T-SQL » String Functions » Regular Expressions 
'_' is for one letter


1CREATE TABLE employee  (emp_no    INTEGER NOT NULL,
2>                         emp_fname CHAR(20NOT NULL,
3>                         emp_lname CHAR(20NOT NULL,
4>                         dept_no   CHAR(4NULL)
5> GO
1insert into employee values(1,  'Matthew', 'Smith',    'd3')
2insert into employee values(2,  'Ann',     'Jones',    'd3')
3insert into employee values(3,  'John',    'Barrimore','d1')
4insert into employee values(4,  'James',   'James',    'd2')
5insert into employee values(5,  'Elsa',    'Bertoni',  'd2')
6insert into employee values(6,  'Elke',    'Hansel',   'd2')
7insert into employee values(7,  'Sybill',  'Moser',    'd1')
8> GO

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
1select from employee
2> GO
emp_no      emp_fname            emp_lname            dept_no
----------- -------------------- -------------------- -------
          Matthew              Smith                d3
          Ann                  Jones                d3
          John                 Barrimore            d1
          James                James                d2
          Elsa                 Bertoni              d2
          Elke                 Hansel               d2
          Sybill               Moser                d1

(rows affected)
1>
2SELECT emp_fname, emp_lname, emp_no FROM employee WHERE emp_fname LIKE '_a%'
3> GO
emp_fname            emp_lname            emp_no
-------------------- -------------------- -----------
Matthew              Smith                          1
James                James                          4

(rows affected)
1> drop table employee
2> GO
1>
           
       
Related examples in the same category
1. Begin with a character in the range C through F
2. ^ specifies the negation of a range or a list of characters
3. Any of the wildcard characters (%, _ [, ], or ?) enclosed in square brackets stand for themselves
4. '%' is for any length of letters
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