Program at the university of reading are gentle, ask the question might be a little silly,,
The summary table is only two column is the column name is invalid, but in the table the column, table is one-time finish has not changed,
Please, great spirit to guide the

CodePudding user response:

Code of incomplete, invalid appeared to be listed in the From of words does not exist, a closer look at the alias D, E, S, respectively, represents the table or sub queries?

CodePudding user response:

reference 1st floor datafansbj response:

code of incomplete, invalid appeared to be listed in the From of words does not exist, a closer look at the alias D, E, S, respectively, represents the table or sub queries?

because no other code no problem don't stick, and according to the book dozen of other students, no problem,,

CodePudding user response:

Don't this kind of attitude, no problem is not an error, the SQL problem certainly exist, the same code in normal elsewhere, not in your here is normal, because the code execution but also affected by various environmental impacts,

CodePudding user response:

Incomplete statements to judgment

CodePudding user response:

The from D E S this is three tables, column should be three tables have the same name