Cannot invoke "java.sql.Connection.createStatement()" because "con" is null
49
What is a NullPointerException, and how do I fix it?
7065
Must JDBC Resultsets and Statements be closed separately although the Connection is closed afterwards?
118970
How do I include nulls during comparisons in SQL Server?
93041
using nulls in a mysqli prepared statement
53797
mysqli prepared statements, insert NULL using bind params
86532
mysql jdbc driver does not support delimiters in triggers with multiple statements
2116
IllegalArgumentException or NullPointerException for a null parameter?
144658
System.NullPointerException: Attempt to de-reference a null object ,sravn
53319
ArgumentException or ArgumentNullException for string parameters?
82709
SQLException: Invalid Column Name...?
37988
System.NullPointerException: Attempt to de-reference a null object:
22361
String concatenation with Null
47931
java.sql.SQLException: No database selected - why?
56860
java.sql.SQLException: Column count doesn't match value count at row 1
128142
java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22)
131308
Use cases for Object.create(null)
114718
Is there a DBMS that allows the "= NULL" syntax?