i have a table like
id name
10 bob
20 bill
i want to select only name column in output with double quotes
like select '"'||name||'"' from table
it is giving me the correct output but is there any other way without using concatenation ...
Thank you..
Using this you can get result with double quotes
' " ' + columnName + ' " '
Example
Query
SELECT '"'+Name+'"' , Age
FROM customer
Result
"Viranja" | 27
Create a virtual column that adds the quotes:
CREATE TABLE
....
quoted_name VARCHAR2 GENERATED ALWAYS AS ('"' || name || '"') VIRTUAL,
...
See here for more information:
http://www.oracle-base.com/articles/11g/virtual-columns-11gr1.php
this will check for any name with at least one double quote
select * from table
where name like '%"%'
If your intention is to be able to "export" the result into space or comma-delimited text file, use a view to "format" your data. You will need to this for your date columns as well.
There are two scenarios you would want to use double quotes in sql in my opinion.
Updating a string column which contains single multiple quotes in it. (you have to escape it)
updating blog contents in columns which you cant edit in "edit top 200 rows"
so, if you want to use double quotes follow this.
SET QUOTED_IDENTIFIER OFF
BEGIN
DECLARE #YourSqlStmt AS VarChar(5000) -- Declare a variable.
SET #YourSqlStmt = "ok"
PRINT #YourSqlStmt -- do your operations here
END
This saves time and you need not to escape single quotes in a existing string content of the column.
Related
Im trying to remove all instances of double quotes from an entire SQL table, and replace these double quotes " " with signle quotes ' '.
Is there an efficient way to do this? thanks!
If you want to change the column names, you would need to update the table:
update tablename
select column_name = replace(column_name, '"', '')
where column_name like '%"%';
To replace double quotes with single quotes, simply do
Update table
set column=replace('"','''')
where column like '%"%'
If you just want to select that column without any double quote in it:
SELECT *,REPLACE(columnname, '"','') FROM tableName
If you want to update you column by replacing all the double quote(") then Gordon provided you the right answer.
update tablename select columnname = replace(columnname, '"', '') WHERE charindex('"',columnname)>0
How can I make a query to see if any record have the value (')?
I have tried this:
Select * from table where column LIKE '%'%' and other variants and still get sintax error.
And i have the same problem when I do a query like:
Select * from table where column == 'hello'world'
I have in the database a record stored with hello'world
I guess that bot questions have the same answer.
You just have to escape it by using the single quote twice (''), It will be considered as the single quote rather than the starting/ending of the string as follows:
Select * from table where column LIKE '%''%'
You can also use the QUOTED_IDENTIFIER:
According to documentation, When QUOTED_IDENTIFIER is OFF, Literals can
be delimited by either single or double quotation marks. If a literal
string is delimited by double quotation marks, the string can contain
embedded single quotation marks, such as apostrophes.
You can use it as follows:
SET QUOTED_IDENTIFIER OFF;
Select * from table where column LIKE "%'%"
SET QUOTED_IDENTIFIER ON;
' has to be doubled:
Select * from tab where col LIKE '%''%'
Is it possible to add to the result value inside a column commas?
I mean for example I create new value:
insert into dbo.SAPID (TEST2)
Values (110)
I want the value to be with commas='110' inside the column result set.
insert into dbo.SAPID (TEST2)
Values (char(39) + '110' + char(39))
Please clarify your request. It seems like TEST2 is an Integer and you would like to return a string with single quotes surrounding it.
To do this you can cast the value when selected and append the quote:
SELECT '''' + CAST( TEST2 AS NVARCHAR(10) ) + '''' FROM SAPID
I believe you are thinking of single quotes '' like you provided in your example above:
I want the value to be with commas='110'
In that case, you could just do something like this:
--your column in the table will need to be a string instead of int
create table dbo.SAPID (TEST2 nvarchar(10));
--insert string value with single quotes
insert into dbo.SAPID(TEST2)
VALUES ('''' + '110' + '''');
--select statement
select * from dbo.SAPID
Single quote is an escape character in SQL much like other languages.Single quotes are escaped by doubling them up, just as shown in above example.
SQL Fiddle Demo
I have a table, my_table, that has a field my_field. myfield is defined as VARCHAR(7). When I do:
SELECT myfield
FROM my_table;
I get what appears to be the entire 7 characters, but I only want the actual data.
I tried:
SELECT TRIM(myfield)
FROM my_table;
and several variations. But instead of getting 'abcd', I get 'abcd '.
How do I get rid of the trailing blanks?
As others have said:
trim whitespace before data enters the database ("Mop the floor...);
ensure this is not actually a column of type CHAR(7).
Additionally, add a CHECK constraint to ensure no trailing spaces ("...fix the leak.") While you are at it, also prevent leading spaces, double spaces and zero-length string e.g.
CREATE TABLE my_table
(
myfield VARCHAR(7) NOT NULL
CONSTRAINT myfield__whitespace
CHECK (
NOT (
myfield = ''
OR myfield LIKE ' %'
OR myfield LIKE '% '
OR myfield LIKE '% %'
)
)
);-
VARCHAR columns will not pad the string you insert, meaning if you are getting 'ABCD ', that's what you stored in the database. Trim your data before inserting it.
Make sure you are not using the CHAR datatype, which will pad your data in the way you suggest. In any case:
SELECT TRIM(myfield) FROM mytable;
will work.
Make sure also that you are not confusing the way the SQL interpreter adds padding chars to format the data as a table with the actual response.
Make sure that you are not inserting data in this column from a CHAR(7) field.
You need to trim your result when selecting as opposed to when inserting, eg:
SELECT TRIM(myfield) FROM my_table;
I have a table with a 'filename' column.
I recently performed an insert into this column but in my haste forgot to append the file extension to all the filenames entered. Fortunately they are all '.jpg' images.
How can I easily update the 'filename' column of these inserted fields (assuming I can select the recent rows based on known id values) to include the '.jpg' extension?
The solution is:
UPDATE tablename SET [filename] = RTRIM([filename]) + '.jpg' WHERE id > 50
RTRIM is required because otherwise the [filename] column in its entirety will be selected for the string concatenation i.e. if it is a varchar(20) column and filename is only 10 letters long then it will still select those 10 letters and then 10 spaces. This will in turn result in an error as you try to fit 20 + 3 characters into a 20 character long field.
MattMitchell's answer is correct if the column is a CHAR(20), but is not true if it was a VARCHAR(20) and the spaces hadn't been explicitly entered.
If you do try it on a CHAR field without the RTRIM function you will get a "String or binary data would be truncated" error.
Nice easy one I think.
update MyTable
set filename = filename + '.jpg'
where ...
Edit: Ooh +1 to #MattMitchell's answer for the rtrim suggestion.
If the original data came from a char column or variable (before being inserted into this table), then the original data had the spaces appended before becoming a varchar.
DECLARE #Name char(10), #Name2 varchar(10)
SELECT
#Name = 'Bob',
#Name2 = 'Bob'
SELECT
CASE WHEN #Name2 = #Name THEN 1 ELSE 0 END as Equal,
CASE WHEN #Name2 like #Name THEN 1 ELSE 0 END as Similiar
Life Lesson : never use char.
I wanted to adjust David B's "Life Lesson". I think it should be "never use char for variable length string values" -> There are valid uses for the char data type, just not as many as some people think :)
The answer to the mystery of the trailing spaces can be found in the ANSI_PADDING
For more information visit: SET ANSI_PADDING (Transact-SQL)
The default is ANSI_PADDIN ON. This will affect the column only when it is created but not to existing columns.
Before you run the update query, verify your data. It could have been compromised.
Run the following query to find compromised rows:
SELECT *
FROM tablename
WHERE LEN(RTRIM([filename])) > 46
-- The column size varchar(50) minus 4 chars
-- for the needed file extension '.jpg' is 46.
These rows either have lost some characters or there is not enough space for adding the file extension.