Question

There are databases on Firebird and SQL Server. I have working stored procedure in Firebird.

Question is: how to translate it to T-SQL syntax?

begin
  IF ((:PHONE_N is NULL) or (STRLEN(:PHONE_N)<1))  THEN
    BEGIN
      O_PHONE_N = NULL;
      EXIT;
    END

  IF (STRLEN(PHONE_N) > 3) THEN
    BEGIN
      O_PHONE_N = '(' || SUBSTR(:PHONE_N, 1, 3) || ') ';
      PHONE_N = SUBSTR(:PHONE_N, 4, STRLEN(:PHONE_N));
      IF (STRLEN(:PHONE_N)> 3) THEN
        begin
          O_PHONE_N = O_PHONE_N || SUBSTR(:PHONE_N, 1, 3);
          PHONE_N = SUBSTR(:PHONE_N, 4, STRLEN(:PHONE_N));
          IF (STRLEN(:PHONE_NUMBER)> 0) THEN
            O_PHONE_N = O_PHONE_N || '-' ||:PHONE_N;
        END
      ELSE
        O_PHONE_N = :O_PHONE_N || :PHONE_N;
    END
  ELSE
    O_PHONE_N = :PHONE_N;
end

Answer 1

This link might help a bit: http://www.firebirdsql.org/manual/migration-mssql-syntax.html

This might help a bit:

• leading @ marks a T-SQL variable (e.g. @phone_n)
• STRLEN is called LEN() in T-SQL
• SUBSTR is SUBSTRING

Check out the excellent MSDN documentation on T-SQL for more details on T-SQL syntax