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Escape Character Description {} Use braces to escape a string of characters or symbols. Everything within a set of braces in considered part of the escape sequence. When you use braces to escape a single character, the escaped character becomes a separate token in the query. \ Use the backslash character to escape a single character or symbol. Mar 05, 2015 · To use a transaction variable in an SQL query, use one of the following syntaxes in the query: • {variable_name}: the simple-brace notation – variable name surrounded by curly braces – protects the SQL query from SQL injections, i.e. only the first value represented by the variable is used, discarding any further content (SQL injection). Part 6 in a series on the basics of the relational database and SQL By Melanie Caffrey . July/August 2012. Part 5 in this series, “An Order of Sorts” (Oracle Magazine, May/June 2012), introduced the ORDER BY clause of a SQL SELECT statement (or query) and how it behaves in conjunction with certain options and keywords to order (or sort) the data in query results.