How often have inverted commas in an inserted text to be doubled?

Question

Hello,
if I want to insert a text into a string field and the text contains inverted commas, how often have these inverted commas to be doubled, to avoid inserting errors and to keep the original inverted commas after insertion?
Example "this is a text to be inserted and it contains *'text in inverted commas'* and normal text" How has it to look to keep the single inverted commas in the the text after inserting it?
Regards
Carsten

Answer 1

Use (a) the quote operator or (b) escape quotes.
For the first case, assuming you're on 10g or higher, your example would be:
Insert into tab1 values( q'{this is a text to be inserted and it contains 'text in inverted commas'}'); For the second case, simply add a single quote to escape another. Your example would be:
Insert into tab1 values( 'this is a text to be inserted and it contains ''text in inverted commas'''); (Notice the trailing quote is the end-quote for the entire text.)
Edited by: Sharma on Mar 21, 2011 4:26 PM