The Column Name Is Not Valid - Error
Solution 1:
resultset.getString("company.short_name");
is wrong here. No need to specifying fully qualified name while trying to fetch the data in your application. Just specify the column name like resultset.getString("short_name");
.
Cause even though you say select company.short_Name ...
query out the column name as short_Name
since that's what defined in table schema.
In case both tables has same column which may result in ambiguity, give a alias name to the columns like
select company.short_Name as company_shortname,
location.short_Name as location_shortname,
location.location_name from company,location;
Solution 2:
When you do
select company.short_Name,location_name from company,location;
This query outs the column name short_Name and resultSet would also have short_Name
since the company.short_name doesnt exist you get an error.
Solution 3:
add the following to your application.properties file spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
Solution 4:
the function resultset.getString(String columnLabel)
Retrieves the value of the designated column in the current row of this ResultSet object as a String in the Java programming language.
Parameters:
columnLabel the label for the column specified with the SQL AS clause. If the SQL AS clause was not specified, then the label is the name of the column
Returns:
the column value; if the value is SQL NULL, the value returned is null Throws: SQLException - if the columnLabel is not valid; if a database access error occurs or this method is called on a closed result set
in the function resultset.getString(String columnLabel)
, the arg
is a column name for executing sql, the statement select company.short_Name,location_name from company,location;
will get a result set, which has table headers short_Name,location_name
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