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    <p>I think you have almost got the expression correct except for the additional slash in the replacement string. Here are the expressions that might work for you.</p> <p><strong>Expression #1:</strong> Removes all double quotes within a given string.</p> <pre><code>REPLACE(COLA, "\"", "") </code></pre> <p><strong>Expression #2:</strong> Replaces all <strong>double</strong> occurrences of double quotes with <strong>single</strong> occurrence of double quotes.</p> <pre><code>REPLACE(COLA, "\"\"", "\"") </code></pre> <p>Here is an example that demonstrates expression #1:</p> <ol> <li>Screenshot #<strong>1</strong> shows the CSV file that will be read by a package.</li> <li>Screenshot #<strong>2</strong> shows the <code>Derived Column transformation</code> inside the <code>Data Flow task</code> that will replace all double quotes within the first column named as <strong>Header</strong>.</li> <li>Screenshot #<strong>3</strong> shows data in the table after the package execution. Notice that the double quotes in second column are left as it is because there is no expression to replace them.</li> </ol> <p>Here is an example that demonstrates expression #2:</p> <ol> <li>This example will use the same file as in example 1. Refer screenshot #<strong>1</strong>.</li> <li>Screenshot #<strong>4</strong> shows the <code>Derived Column transformation</code> inside the <code>Data Flow task</code> that will replace all <strong>double</strong> occurrences of double quotes with <strong>single</strong> occurrence of double quotes within the first column named as <strong>Header</strong>.</li> <li>Screenshot #<strong>5</strong> shows data in the table after the package execution. Notice that the double quotes in second column are left as it is because there is no expression to replace them.</li> </ol> <p>Hope that helps.</p> <p><strong>Screenshot #1:</strong></p> <p><img src="https://i.stack.imgur.com/ODaKG.png" alt="1"></p> <p><strong>Screenshot #2:</strong></p> <p><img src="https://i.stack.imgur.com/38krQ.png" alt="2"></p> <p><strong>Screenshot #3:</strong></p> <p><img src="https://i.stack.imgur.com/2MaKV.png" alt="3"></p> <p><strong>Screenshot #4:</strong></p> <p><img src="https://i.stack.imgur.com/6r5hA.png" alt="4"></p> <p><strong>Screenshot #5:</strong></p> <p><img src="https://i.stack.imgur.com/gD4b4.png" alt="5"></p>
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    1. POHow to replace double quotes in derived column transformation?
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    1. POHow to replace double quotes in derived column transformation?
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    1. COWhat if the flat file source connection fails to process the file? you don't get passed the first step and therefore can't make it to the Derived Column transformation.
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