SQL: SELECT * FROM tb WHERE datetime>”…..” and datetime <”…..”

CREATE TABLE tb
(DataSource STRING, datetime TEXT, Open REAL, High REAL, Low REAL, Close REAL, Volume Integer, FileName STRING, QUIK_DT TEXT)

type TProcessMemoryCountersEx = packed record
  cb: DWORD;
  PageFaultCount: DWORD;
  PeakWorkingSetSize: DWORD;
  WorkingSetSize: DWORD;
  QuotaPeakPagedPoolUsage: DWORD;
  QuotaPagedPoolUsage: DWORD;
  QuotaPeakNonPagedPoolUsage: DWORD;
  QuotaNonPagedPoolUsage: DWORD;
  PagefileUsage: DWORD;
  PeakPagefileUsage: DWORD;
  PrivateUsage: DWORD;
 end;

function CurrentProcessMemory: Cardinal;
var
  MemCounters: TProcessMemoryCounters;
begin
  MemCounters.cb := SizeOf(MemCounters);
  if GetProcessMemoryInfo(GetCurrentProcess,@MemCounters,SizeOf(MemCounters)) then
    Result := MemCounters.WorkingSetSize
  else
    RaiseLastOSError;
end;