Difference between revisions of "SQLQuery"
From SCAR Divi Manual
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Revision as of 23:46, 9 February 2012
Definition
function SQLOpen(const Path: string; const CreateIfNotFound: Boolean): Integer;
Availability
SCAR Divi 3.31 > Current
Description
Allows you to execute a "simple" SQLite3 query statement Query on an open database connection specified by DBIndex. If you would like to retrieve data from the database, use parameter binding and/or have more control over your database interactions, you should use SQLQueryEx.
Example
var
DB, Query, InsertID: Integer;
begin
DB := SQLOpen(WorkspacePath + 'test.db3', True);
try
// Create a table
SQLQuery(DB, 'CREATE TABLE IF NOT EXISTS test(id INTEGER PRIMARY KEY, string TEXT)');
// Insert 2 rows into the table
Query := SQLQueryEx(DB, 'INSERT INTO test VALUES(NULL, ?)');
try
SQLBindStr(Query, 1, 'Hello Mars!');
SQLQueryStep(Query);
SQLQueryReset(Query);
SQLBindStr(Query, 1, 'Hello World!');
SQLQueryStep(Query);
InsertID := SQLLastID(DB);
finally
SQLQueryFree(Query);
end;
// Get the data stored in the last row
Query := SQLQueryEx(DB, 'SELECT * FROM test WHERE id = ?');
try
SQLBindInt(Query, 1, InsertID);
if SQLQueryStep(Query) = SQL_ROW then
WriteLn(SQLColumnStr(Query, 1));
finally
SQLQueryFree(Query);
end;
finally
SQLFree(DB);
end;
end.Output:
Hello World!
