SQLite Delphi认为不正确的异常

Question

Project CompetitionServer.exe raised exception class ESQLiteException with message 'Error executing SQL.
Error [1]: SQL error or missing database.
"INSERT INTO MatchesTable(MatchesID,RoundID,AkaFirstName,AoFirstName)VALUES(1,2,p,o)": no such column: p'. Process stopped. Use Step or Run to continue.

Yes, p is NOT a column, it is the data I am trying to insert. How can I fix this problem?

Answer 1

In SQL, string constants that are data must be enclosed in quotes. Otherwise the string is interpreted as a keyword, table name, or column name, which is what's happening here. Use 'p' instead of plain p.

Answer 2

You value 'p' is a constant, so you need to put it in quotes. So the statement needs to be

INSERT INTO MatchesTable(MatchesID,RoundID,AkaFirstName,AoFirstName)VALUES(1,2,'p','o')

Answer 3

You have to use SQL parameters. The standard Delphi approach to that:

Query1.SQL.Text := 'INSERT INTO MatchesTable(MatchesID,RoundID,AkaFirstName,AoFirstName)VALUES(1,2,:p,:o)';
Query1.Params[0].Value := ...;
Query1.Params[1].Value := ...;
Query1.ExecSQL;

But details may depend on the data access components you are using.