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POReplacing the single quotes for columns in select statement in SQL Server
 

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  1. POReplacing the single quotes for columns in select statement in SQL Server
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    <p>I have 2 tables. In <code>table1</code> I have some rows for persons like this:</p> <ol> <li>PersonX - ID</li> <li>PersonX - Name</li> <li>PersonX - Address</li> <li>PersonY - ID</li> <li>PersonY - AGE</li> </ol> <p>In 2nd table, above mentioned <code>ID, NAME,ADDRESS,AGE</code> will be columns. And we have detailed data of personX and PersonY here.</p> <p>Now, main issue is in stored procedure, using cursor, I am storing <code>table1</code> values (<code>'ID', 'Name', ...</code>) in a variable <code>@Element</code>.</p> <p>Now I am using select statement in same cursor as below:</p> <pre><code>SELECT @Element From Table2 </code></pre> <p>I need output of user details like his id, age, address etc. But instead I am getting output as <code>'ID', 'NAME', 'AGE'</code> etc....</p> <p>I found that this is because <code>@Element</code> is <code>varchar</code> and has string value, so select statement is executed as below:</p> <pre><code>SELECT 'ID' from table2. </code></pre> <p>but all I need is like below </p> <pre><code>SELECT ID FROM TABLE2 </code></pre> <p>I used replace function its not working for me. Case function, I can't use it because we can't say what data is there for a person in <code>table1</code>. It varies. I need one dynamic statement which can be use for all records. instead of executing case for each record.</p> <pre><code>SELECT REPLACE(@Element,'''','') FROM TABLE2 </code></pre> <p>(Still getting 'ID' as output, instead of corresponding value in Table2)</p> <p>Please help me in this. Hope you understand my explanation </p>
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    1. COIf you want to **parametrize** table or column names in a `SELECT`, you have to use **dynamic SQL** - create your SQL statement as a `NVARCHAR(x)` variable, and then execute that SQL statement you've built up. There is no other way to do this.
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