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Fix The Exception “Error: missing from-clause entry for table” - TutoPal

Fix The Exception “Error: missing from-clause entry for table”

SQL is also known as the structured query language for manipulating, storing, and retrieving data in the database. When it comes to using a database for either small or large volume of data, SQL is widely used. It is a special-purpose computer language for databases. Managing data using SQL is not a hard nut to crack. Even beginners can use SQL by trying various projects so that they can become masters in SQL. When you are working with SQL, it is obvious to face errors, and “Error: missing from-clause entry for table” is one of those errors that you may encounter.

You don’t need to worry when you get this error message as you are here to get the issue fixed, and we won’t let you go without helping you. We have efficient ways to handle the error you are getting. But, first, you need to figure out how the error occurs

How the error pops up

Whenever you try to use an inner join a table and a view, you land up in the error message. You get the following error

missing FROM-clause entry for table "gtab82"

Check out the script that results in the error

SELECT 
   AcId, AcName, PldepPer, RepId, CustCatg, HardCode, BlockCust, CrPeriod, CrLimit, 
   BillLimit, Mode, PNotes, gtab82.memno 
FROM
   VCustomer 
INNER JOIN   
   vcustomer AS v1 ON gtab82.memacid = v1.acid 
WHERE (AcGrCode = '204' OR CreDebt = 'True') 
AND Masked = 'false'
ORDER BY AcName

You must be wondering how to get rid of it. Have a look at the next section to fix the error

How To Fix the Exception “Error: missing from-clause entry for table”

The reason that causes the error is the absence of the gtab82 table in FROM or JOIN clauses. Another possible reason to get the error warning is that the WHERE clause does not have the alias name you used for a table included. To solve the error, check out the solution

The Solution to handle the error

You may have used an alias for the name of the table when it is necessary to prefix a column with the table name, such as when there are column names that are duplicate in the connected tables and the table name is lengthy or when the table is attached to itself. In your case, VCustomer has an alias, but for inexplicable reasons, you only utilize it in the ON clause. You ought to double-check your code to avoid errors. Check out the code you can implement to resolve the error

SELECT 
   AcId, AcName, PldepPer, RepId, CustCatg, HardCode, BlockCust, CrPeriod, CrLimit, 
   BillLimit, Mode, PNotes, gtab82.memno 
FROM
   VCustomer AS v1
INNER JOIN   
   gtab82 ON gtab82.memacid = v1.AcId 
WHERE (AcGrCode = '204' OR CreDebt = 'True') 
AND Masked = 'false'
ORDER BY AcName

This way the error warning that’s popping up will go away.

Conclusion

And that’s exactly how you get rid of the error warning “Error: missing from-clause entry for table”. Implementing the solution is simple.

I hope you find it helpful! I wish you happy coding!

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