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sql server programming
group:Converting a String to a table of characters
sql server programming:
I have created a table of characters, ascii codes and the military call words (alpha, bravo, etc.) and would like to create a SELECT statement to convert a string into a table to match up to the letters in the table. my ascii code table: unicode_code unicode_character description 65 A Uppercase Alpha 66 B Uppercase Bravo .... I would like to take a string @MyString = "Apple" to return a table showing each letter in the string from the above table, and (hopefully) a new column showing the character position, in this case 1-5 for the 5 characters in @MyString. The intersting thing is that SQL seems to match uppercase "A" with lowercase "a" Any ideas? Thank You, Julian
Your database collation is case-insensitive. Change the collation to
case-sensitive. [quoted text, click to view] "stjulian" <stjulian@discussions.microsoft.com> wrote in message news:OEdMhk3tHHA.4972@TK2MSFTNGP05.phx.gbl... > SQL2000 > > I have created a table of characters, ascii codes and the military call > words (alpha, bravo, etc.) and would like to create a SELECT statement to > convert a string into a table to match up to the letters in the table. > > my ascii code table: > > unicode_code unicode_character description > 65 A Uppercase Alpha > 66 B Uppercase Bravo > ... > > > I would like to take a string > @MyString = "Apple" > > to return a table showing each letter in the string from the above table, > and (hopefully) a new column showing the character position, in this case > 1-5 for the 5 characters in @MyString. > > The intersting thing is that SQL seems to match uppercase "A" with > lowercase "a" > > Any ideas? > > > Thank You, > > Julian >
Well, I came up with this
DECLARE @pos INT DECLARE @Mystring Varchar(50) DECLARE @CharCode INT DECLARE @tbl TABLE (position INT, code INT) SET @pos = 1 SET @MyString='HaPPiness' WHILE @pos <= LEN(@MyString) BEGIN SET @CharCode = UNICODE(SUBSTRING(@Mystring, @pos, 1)) INSERT @tbl(position, code) VALUES (@pos, @CharCode) SET @pos = @pos + 1 END SELECT position, B.unicode_code, B.unicode_character, B.letterdescription FROM @tbl A INNER JOIN tblAsciiCodes B on A.code = B.unicode_code ORDER BY position the result: position unicode_code unicode_character letterdescription ----------- ------------ ----------------- -------------------- 1 72 H Uppercase Hotel 2 97 a Lowercase Alpha 3 80 P Uppercase Papa 4 80 P Uppercase Papa 5 105 i Lowercase India 6 110 n Lowercase November 7 101 e Lowercase Echo 8 115 s Lowercase Sierra 9 115 s Lowercase Sierra (9 row(s) affected) How did I do? Julian [quoted text, click to view] "Mike C#" <xyz@xyz.com> wrote in message news:euVbI53tHHA.4612@TK2MSFTNGP04.phx.gbl... > Your database collation is case-insensitive. Change the collation to > case-sensitive. > > "stjulian" <stjulian@discussions.microsoft.com> wrote in message > news:OEdMhk3tHHA.4972@TK2MSFTNGP05.phx.gbl... >> SQL2000 >> >> I have created a table of characters, ascii codes and the military call >> words (alpha, bravo, etc.) and would like to create a SELECT statement to >> convert a string into a table to match up to the letters in the table. >> >> my ascii code table: >> >> unicode_code unicode_character description >> 65 A Uppercase Alpha >> 66 B Uppercase Bravo >> ... >> >> >> I would like to take a string >> @MyString = "Apple" >> >> to return a table showing each letter in the string from the above table, >> and (hopefully) a new column showing the character position, in this case >> 1-5 for the 5 characters in @MyString. >> >> The intersting thing is that SQL seems to match uppercase "A" with >> lowercase "a" >> >> Any ideas? >> >> >> Thank You, >> >> Julian >> > >
I am going to turn this into a stored procedure. Will the @tbl be removed
out of memory along with the rest of the variables after the SP executes and returns the table? Is there anything that has to be done with variables and tables creates in a stored procedure or do they disappear on their own? Julian [quoted text, click to view] "stjulian" <stjulian@discussions.microsoft.com> wrote in message news:eDQEsA4tHHA.768@TK2MSFTNGP04.phx.gbl... > Well, I came up with this > > DECLARE @pos INT > DECLARE @Mystring Varchar(50) > DECLARE @CharCode INT > DECLARE @tbl TABLE (position INT, code INT) > > SET @pos = 1 > SET @MyString='HaPPiness' > > WHILE @pos <= LEN(@MyString) > BEGIN > SET @CharCode = UNICODE(SUBSTRING(@Mystring, @pos, 1)) > INSERT @tbl(position, code) VALUES (@pos, @CharCode) > SET @pos = @pos + 1 > END > > SELECT position, B.unicode_code, B.unicode_character, B.letterdescription > FROM @tbl A > INNER JOIN tblAsciiCodes B on A.code = B.unicode_code > ORDER BY position > > > the result: > > > position unicode_code unicode_character letterdescription > ----------- ------------ ----------------- -------------------- > 1 72 H Uppercase Hotel > 2 97 a Lowercase Alpha > 3 80 P Uppercase Papa > 4 80 P Uppercase Papa > 5 105 i Lowercase India > 6 110 n Lowercase November > 7 101 e Lowercase Echo > 8 115 s Lowercase Sierra > 9 115 s Lowercase Sierra > > (9 row(s) affected) > > > > How did I do? > > Julian > > > > "Mike C#" <xyz@xyz.com> wrote in message > news:euVbI53tHHA.4612@TK2MSFTNGP04.phx.gbl... >> Your database collation is case-insensitive. Change the collation to >> case-sensitive. >> >> "stjulian" <stjulian@discussions.microsoft.com> wrote in message >> news:OEdMhk3tHHA.4972@TK2MSFTNGP05.phx.gbl... >>> SQL2000 >>> >>> I have created a table of characters, ascii codes and the military call >>> words (alpha, bravo, etc.) and would like to create a SELECT statement >>> to convert a string into a table to match up to the letters in the >>> table. >>> >>> my ascii code table: >>> >>> unicode_code unicode_character description >>> 65 A Uppercase Alpha >>> 66 B Uppercase Bravo >>> ... >>> >>> >>> I would like to take a string >>> @MyString = "Apple" >>> >>> to return a table showing each letter in the string from the above >>> table, and (hopefully) a new column showing the character position, in >>> this case 1-5 for the 5 characters in @MyString. >>> >>> The intersting thing is that SQL seems to match uppercase "A" with >>> lowercase "a" >>> >>> Any ideas? >>> >>> >>> Thank You, >>> >>> Julian >>> >> >> > >
[quoted text, click to view] "stjulian" <stjulian@discussions.microsoft.com> wrote in message news:uW2V3E4tHHA.4972@TK2MSFTNGP05.phx.gbl... >I am going to turn this into a stored procedure. Will the @tbl be removed >out of memory along with the rest of the variables after the SP executes >and returns the table? Is there anything that has to be done with variables >and tables creates in a stored procedure or do they disappear on their own? > > Julian Sure, that'll do. Variables and table variables have well-defined scope, so they exist only during execution of the SP.
What you have will work. The disadvantage is that in SQL set based
solutions are almost always faster than loops or cursors. And with the right tables, this can be done with a simple Select statement. First, create your tblAsciiCodes table with the unicode_character column having a collation of SQL_Latin1_General_CP1_CS_AS (or some other case sensitive collation). That will tell SQL that for this column you want upper case letters (eg, 'A') to be considered different from lower case letters (eg, 'a') when doing comparisions on this column (See COLLATE in BOL for a discussion of collations in SQL). The table should look something like: Create Table tblAsciiCodes ( unicode_character nchar(1) Collate SQL_Latin1_General_CP1_CS_AS Primary Key, letterdescription varchar(20)) and load it with the appropriate values. Then create a Numbers table. See http://sqlserver2000.databases.aspfaq.com/why-should-i-consider-using-an-auxiliary-numbers-table.html for how to do this and some of the ways you can use one. Once you have it, you can get the result you want with the query Select n.Number As Position, Unicode(a.unicode_character) As unicode_code, a.unicode_character, a.letterdescription From Numbers n Inner Join tblAsciiCodes a On Substring(@MyString, n.Number, 1) = a.unicode_character Where n.Number <= Len(@MyString) Order By n.Number Tom [quoted text, click to view] "stjulian" <stjulian@discussions.microsoft.com> wrote in message news:eDQEsA4tHHA.768@TK2MSFTNGP04.phx.gbl... > Well, I came up with this > > DECLARE @pos INT > DECLARE @Mystring Varchar(50) > DECLARE @CharCode INT > DECLARE @tbl TABLE (position INT, code INT) > > SET @pos = 1 > SET @MyString='HaPPiness' > > WHILE @pos <= LEN(@MyString) > BEGIN > SET @CharCode = UNICODE(SUBSTRING(@Mystring, @pos, 1)) > INSERT @tbl(position, code) VALUES (@pos, @CharCode) > SET @pos = @pos + 1 > END > > SELECT position, B.unicode_code, B.unicode_character, B.letterdescription > FROM @tbl A > INNER JOIN tblAsciiCodes B on A.code = B.unicode_code > ORDER BY position > > > the result: > > > position unicode_code unicode_character letterdescription > ----------- ------------ ----------------- -------------------- > 1 72 H Uppercase Hotel > 2 97 a Lowercase Alpha > 3 80 P Uppercase Papa > 4 80 P Uppercase Papa > 5 105 i Lowercase India > 6 110 n Lowercase November > 7 101 e Lowercase Echo > 8 115 s Lowercase Sierra > 9 115 s Lowercase Sierra > > (9 row(s) affected) > > > > How did I do? > > Julian > > > > "Mike C#" <xyz@xyz.com> wrote in message > news:euVbI53tHHA.4612@TK2MSFTNGP04.phx.gbl... >> Your database collation is case-insensitive. Change the collation to >> case-sensitive. >> >> "stjulian" <stjulian@discussions.microsoft.com> wrote in message >> news:OEdMhk3tHHA.4972@TK2MSFTNGP05.phx.gbl... >>> SQL2000 >>> >>> I have created a table of characters, ascii codes and the military call >>> words (alpha, bravo, etc.) and would like to create a SELECT statement >>> to convert a string into a table to match up to the letters in the >>> table. >>> >>> my ascii code table: >>> >>> unicode_code unicode_character description >>> 65 A Uppercase Alpha >>> 66 B Uppercase Bravo >>> ... >>> >>> >>> I would like to take a string >>> @MyString = "Apple" >>> >>> to return a table showing each letter in the string from the above >>> table, and (hopefully) a new column showing the character position, in >>> this case 1-5 for the 5 characters in @MyString. >>> >>> The intersting thing is that SQL seems to match uppercase "A" with >>> lowercase "a" >>> >>> Any ideas? >>> >>> >>> Thank You, >>> >>> Julian >>> >> >> > >
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