How do I fix my ORA 30926?
A further clarification to the use of DISTINCT to resolve error ORA-30926 in the general case: You need to ensure that the set of data specified by the USING() clause has no duplicate values of the join columns, i.e. the columns in the ON() clause.
What is non-deterministic where clause?
The key is the non-deterministic where clauses phrase. That phrase means that the the query inside the USING clause returns a non-unique set of rows. The returned rows can’t be matched uniquely against the target table in the ON clause.
What is nondeterministic function?
Nondeterministic functions result in different output each time they are called with a fixed set of input values even if the database state that they access remains the same. For example, GETDATE() function, results the current date and time value, always a different value.
Is SQL query deterministic?
Each built-in function is deterministic or nondeterministic based on how the function is implemented by SQL Server. For example, specifying an ORDER BY clause in a query does not change the determinism of a function that is used in that query. All of the string built-in functions are deterministic, except for FORMAT.
What does deterministic vs nondeterministic mean?
Functions can be either deterministic or nondeterministic. A deterministic function always returns the same results if given the same input values. A nondeterministic function may return different results every time it is called, even when the same input values are provided.
What is deterministic and nondeterministic computation?
Nondeterminism means that the path of execution isn’t fully determined by the specification of the computation, so the same input can produce different outcomes, while deterministic execution is guaranteed to be the same, given the same input.
What are MySQL functions?
In MySQL, a function is a stored program that you can pass parameters into and then return a value.
What is the benefit of Nondeterminism?
Nondeterminism allows the programmer to ignore the details of finding a path. It’s possible simply to tell choose to find a node n such that there is a path from n to our destination. Using nondeterminism we can write the simpler version of descent shown in Figure 22.2.
Is Turing machine deterministic?
In computational complexity discipline, a deterministic Turing machine is a theoretical machine that is used in thought experiments to examine the abilities and limitations of algorithms. In a deterministic Turing machine, the set of rules impose at most one action to be performed for any given situation.
What is advantage of MySQL?
MySQL tops the list of robust transactional database engines available on the market. With features such as complete atomic, consistent, isolated, durable transaction support; multi-version transaction support; and unrestricted row-level locking, it is the go-to solution for full data integrity.
What do you mean by non-deterministic?
Definition of nondeterministic : not relating to or implying determinism : not deterministic nondeterministic theories of free will.