What does it mean when I get rows executed, but with no resulted table?

Why is my query returning 0 rows?

The second most common issue that produces 0 rows returned is that the query is filtering out too much data in the WHERE or HAVING statement. To see if the WHERE or HAVING clause is too restrictive simply remove it from the query to see if any rows are returned.

How do you get rid of null rows in SQL?

To exclude the null values from the table we need to use IS NOT NULL operator with the WHERE clause. WHERE Clause: The WHERE clause is used to filter the records. It will extract those records that fulfill the condition.
 

What does 0 rows affected mean in SQL?

Try select count(*) from phonecalls where PhoneNumber = “999 29-4655”; That will give you the number of matching rows. If the result is 0, then there isn’t a row in the database that matches.-
 

How to check if ResultSet is empty in SQL Server?

The next() method



If there are no rows next to its current position this method returns false, else it returns true. Therefore, soon you retrieve the ResultSet object if the first call on the next() method returns false that indicated that the obtained ResultSet object has no records.
 

What does ExecuteScalar return if no rows?

If the row does not exist, the result of command. ExecuteScalar() is null, which is then casted to a null string and assigned to getusername .

What does 0 mean in SQL query?

“Every [SQL] data type includes a special value, called the null value,”0 “that is used to indicate the absence of any data value”.1. The null value does not indicate why a value is absent—it simply marks the places that do not have a data value.

Why am I getting NULL values in SQL?

A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. Then, the field will be saved with a NULL value.

How do I get rid of trailing blanks in SQL?

The TRIM() function removes the space character OR other specified characters from the start or end of a string. By default, the TRIM() function removes leading and trailing spaces from a string. Note: Also look at the LTRIM() and RTRIM() functions.

Why it is showing no rows selected in SQL?

no rows selected simply means that your table emp has no record at all.
 

Do SQL rows start at 0?

By default, the starting index will start from the value 0 and have an increment of 1 per row.
 

Why mysql returned an empty result set?

An empty result set is returned if there are no rows returned. (An empty result set differs from a null pointer as a return value.)