I need to perform an UPDATE on the database, but within that update there is a section that has ' ' (single quotes), because of these quotes when running the error script, can anyone help me?
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I've been on this stress all afternoon
You can use 2 single quotes for that :
update galaxy
set sun = replace(sun, 'font ''Arial''', 'font ''Arial'' 12px')
where earth = 148;
see: PL/SQL, how to escape single quote in a string?
Related
I'm having an issue figuring out how to ignore signs and variables in a single quote string statement.
I am attempting to update a table with the new text with structure such as:
update xxx
set xxx =
'Our Ref. $BOOKING_NO$
.......
Kind regards'
If your $ chars are being interpreted, it isn't by Oracle ($ isn't special in Oracle anyway, and between single-quotes everything is a string), but rather by your client program or maybe shell script. If, for example, you are running this in SQL*Plus from a Unix-based shell script, you will need to use the appropriate means required by the shell you use to prevent the shell from interpreting $ and ' characters.
I want to run an update on a field to replace
<div>[Any text]</div>
to
Any text
So anywhere it sees a pattern of <div>...</div> surrounding text, it removes these outer characters
Is this possible to do in SQL Server?
Replace
update t set c = replace(replace(c, '<div>', ''), '</div>', '');
You can also use MySQL %like statements to find strings with are similar, or include specific parts of text : http://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html
When i execute the below SQL command using single quotes to enter a number, i got an error
if remove the single quotes,it is successfully updated. knowing that the type of the field HEIGHT is NUMBER.
The strange thing is that i tried to use the same sql statement with single quotes on different machines, some machines execute it successfully, others do not.(same oracle version,same table structure...)
Any explanation please
SQL> UPDATE TBL_DEVICE_INFO SET HEIGHT='14.5' WHERE ID='6ujbfI';
UPDATE TBL_DEVICE_INFO SET HEIGHT='14.5' WHERE ID='6ujbfI'
*
ERREUR à la ligne 1 :
ORA-01722: invalid number
SQL> UPDATE TBL_DEVICE_INFO SET HEIGHT=14.5 WHERE ID='6ujbfI';
1 row updated.
This is most likely a locale problem.
That is, some machines have the decimal symbol "." (period), and some have "," (comma).
You can test it by putting it like this:
UPDATE TBL_DEVICE_INFO
SET HEIGHT = to_number('14.5', '99D9','NLS_NUMERIC_CHARACTERS = ''. ''')
WHERE ID='6ujbfI'
When the number is in single qoutes, oracle will do an implicit conversion to number using the characters set in the database.
You can change the default by setting the NLS_NUMERIC_CHARACTERS parameter:
alter session set NLS_NUMERIC_CHARACTERS = '. ';
but that will also reflect to data returned by the system so make sure that it doesn't break anything in your application if you change that.
Strings should be quoted using single quotes, numbers shouldn't be.
Maybe you're using a different client on the machines where the invalid syntax works?
How can I write an insert statement which includes the & character? For example, if I wanted to insert "J&J Construction" into a column in the database.
I'm not sure if it makes a difference, but I'm using Oracle 9i.
I keep on forgetting this and coming back to it again! I think the best answer is a combination of the responses provided so far.
Firstly, & is the variable prefix in sqlplus/sqldeveloper, hence the problem - when it appears, it is expected to be part of a variable name.
SET DEFINE OFF will stop sqlplus interpreting & this way.
But what if you need to use sqlplus variables and literal & characters?
You need SET DEFINE ON to make variables work
And SET ESCAPE ON to escape uses of &.
e.g.
set define on
set escape on
define myvar=/forth
select 'back\\ \& &myvar' as swing from dual;
Produces:
old 1: select 'back\\ \& &myvar' from dual
new 1: select 'back\ & /forth' from dual
SWING
--------------
back\ & /forth
If you want to use a different escape character:
set define on
set escape '#'
define myvar=/forth
select 'back\ #& &myvar' as swing from dual;
When you set a specific escape character, you may see 'SP2-0272: escape character cannot be alphanumeric or whitespace'. This probably means you already have the escape character defined, and things get horribly self-referential. The clean way of avoiding this problem is to set escape off first:
set escape off
set escape '#'
If you are doing it from SQLPLUS use
SET DEFINE OFF
to stop it treading & as a special case
An alternate solution, use concatenation and the chr function:
select 'J' || chr(38) || 'J Construction' from dual;
The correct syntax is
set def off;
insert into tablename values( 'J&J');
There's always the chr() function, which converts an ascii code to string.
ie. something like:
INSERT INTO
table
VALUES (
CONCAT( 'J', CHR(38), 'J' )
)
You can insert such an string as 'J'||'&'||'Construction'.
It works fine.
insert into table_name (col_name) values('J'||'&'||'Construction');
INSERT INTO TEST_TABLE VALUES('Jonhy''s Sport &'||' Fitness')
This query's output : Jonhy's Sport & Fitness
SET SCAN OFF is obsolete
http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a90842/apc.htm
In a program, always use a parameterized query. It avoids SQL Injection attacks as well as any other characters that are special to the SQL parser.
I've found that using either of the following options works:
SET DEF OFF
or
SET SCAN OFF
I don't know enough about databases to know if one is better or "more right" than the other. Also, if there's something better than either of these, please let me know.
SET ESCAPE ON;
INSERT VALUES("J\&J Construction") INTO custnames;
(Untested, don't have an Oracle box at hand and it has been a while)
If you are using sql plus then I think that you need to issue the command
SET SCAN OFF
Stop using SQL/Plus, I highly recommend PL/SQL Developer it's much more than an SQL tool.
p.s. Some people prefer TOAD.
Look, Andrew:
"J&J Construction":
SELECT CONCAT('J', CONCAT(CHR(38), 'J Construction')) FROM DUAL;
I have a SQL script that creates a package with a comment containing an ampersand (&). When I run the script from SQL Plus, I am prompted to enter a substitute value for the string starting with &. How do I disable this feature so that SQL Plus ignores the ampersand?
This may work for you:
set define off
Otherwise the ampersand needs to be at the end of a string,
'StackOverflow &' || ' you'
EDIT: I was click-happy when saving... This was referenced from a blog.
If you sometimes use substitution variables you might not want to turn define off. In these cases you could convert the ampersand from its numeric equivalent as in || Chr(38) || or append it as a single character as in || '&' ||.
I resolved with the code below:
set escape on
and put a \ beside & in the left 'value_\&_intert'
Att
You can set the special character, which is looked for upon execution of a script, to another value by means of using the SET DEFINE <1_CHARACTER>
By default, the DEFINE function itself is on, and it is set to &
It can be turned off - as mentioned already - but it can be avoided as well by means of setting it to a different value. Be very aware of what sign you set it to. In the below example, I've chose the # character, but that choice is just an example.
SQL> select '&var_ampersand #var_hash' from dual;
Enter value for var_ampersand: a value
'AVALUE#VAR_HASH'
-----------------
a value #var_hash
SQL> set define #
SQL> r
1* select '&var_ampersand #var_hash' from dual
Enter value for var_hash: another value
'&VAR_AMPERSANDANOTHERVALUE'
----------------------------
&var_ampersand another value
SQL>
set define off <- This is the best solution I found
I also tried...
set define }
I was able to insert several records containing ampersand characters '&' but I cannot use the '}' character into the text
So I decided to use "set define off" and everything works as it should.
According to this nice FAQ there are a couple solutions.
You might also be able to escape the ampersand with the backslash character \ if you can modify the comment.
I had a CASE statement with WHEN column = 'sometext & more text' THEN ....
I replaced it with
WHEN column = 'sometext ' || CHR(38) || ' more text' THEN ...
you could also use
WHEN column LIKE 'sometext _ more text' THEN ...
(_ is the wildcard for a single character)