Syntax error while doing C# SQL data insert

string query = $"insert into MessageData values(NULL,'{rehberIsmi}','{jsonData}','{DateTime.Now}')";

using (SQLiteConnection conn = new SQLiteConnection(DatabaseInformation.ConnectionString))
{
    try
    {
        conn.Open();

        SQLiteCommand com = new SQLiteCommand(query, conn);
        com.ExecuteNonQuery();

        conn.Close();
    }
    catch (Exception ex)
    {
       MessageBox.Show("Bir hata meydana geldi : " + ex.Message, "Hata", 
       MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

I am using the above code for data entry into SQLite database, but while getting some string values, I am getting this error:

‘SQL logic error near “da”: syntax error’

What is the reason ?

Wrong json value : "[
{"avatar":"","position":"right","time":"2021.02.12 12:43:54","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"[phone]","msg":"Merhabalar Sizlere nasıl yardımcı olabilirim."},
{"avatar":"","position":"left","time":"2021.02.12 12:43:55","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Merhaba"},{"avatar":"","position":"left","time":"2021.02.12 12:44:03","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Senet ile satışınız varmı"},{"avatar":"","position":"left","time":"2021.02.12 12:44:16","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Kanunu mati 125 için"},{"avatar":"","position":"left","time":"2021.02.12 12:44:20","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Bilgi almak istiyorum"},{"avatar":"","position":"left","time":"2021.02.12 12:44:29","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"10 bin peşin versek diğerini"},{"avatar":"","position":"left","time":"2021.02.12 12:44:37","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"12 aya bölsek nasıl olur"},{"avatar":"","position":"right","time":"2021.02.12 13:39:26","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"[phone]","msg":"https://www.ekuralkan.com/mati-42313 peşin fiyatı 22.353 TL dir. Tüm modellerimizi minimum %25 peşinat ile 36 aya varan taksitler ile alabilirsiniz. https://www.ekuralkan.com/senetli-satis-basvurunhttps://blog.ekuralkan.com/nhttps://www.youtube.com/channel/UCKRIe5B_60bNIR6uSkhxR1g"},{"avatar":"","position":"right","time":"2021.02.12 13:39:36","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"[phone]","msg":"Sitemiz de vade oranlarını inceleyebilirsiniz"},{"avatar":"","position":"left","time":"2021.12.12 23:52:20","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Bağlantı:nhttps://www.instagram.com/p/CXTcf_-jRQM/nnBunu Instagram'da gördüm..."},{"avatar":"","position":"right","time":"2021.12.12 23:52:20","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Mesajınız için teşekkür ederiz. Mesai saatlerimiz hafta içi 07:00 & 17:00’dir. Mesai saatleri içinde en kısa sürede size cevap vereceğiz."},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"https://www.ekuralkan.com/mati-42313 peşin fiyatı 22.353 TL dir. Tüm modellerimizi minimum %25 peşinat ile 36 aya varan taksitler ile alabilirsiniz. https://www.ekuralkan.com/senetli-satis-basvurunhttps://blog.ekuralkan.com/nhttps://www.youtube.com/channel/UCKRIe5B_60bNIR6uSkhxR1g"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Kolay gelsin"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Senentle satış varmı ?"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Findeks üyeliğiniz varsa senetli alım başvurunuzu yapabiliriz"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Nasıl oluyor o"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"kredi notudur"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"internetten kendiniz üye olmanız gerekiyor"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Onu biliyorum"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Findex üyeliğimiz var zaten de"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Başvuruyu nasıl yapıyoruz"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"37.65 KB","mediaName":"attachment_743","mediaTime":"0"","localPath":"media\attachment_743","thumbPath":"media\attachment_743","delete":"false","type":"photo","identifier":"","msg":"IMG-20211213-WA0001.jpg"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"başvurunuzu buradan yapabiliriz siteden kendiniz de yapabilirsiniz"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Link alabilirmiyim"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Bi türlü bulamadım"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"https://isube.findeks.com/ers/uyelik/bireyselUyelik.xhtml"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Üyeliğim var zaten"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"https://www.ekuralkan.com/senetli-satis-basvuru"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"sistemden senetli alım başvurunuzu yapabilirsiniz"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Başvuru yaptım"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Size ulaştımı başvuru"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"onaylandı mı süreciniz"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Başvuru beklemede"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Yazdım"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Yazdı anlamadım bende"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"red olarak sonuçlanmıştır"},{"avatar":"","position":"right","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"ekran çıkmadı ise onaylanmamıştır"},{"avatar":"","position":"left","time":"1971.01.01 00:00:00","mediaSize":"0 Byte","mediaName":"","mediaTime":"0"","localPath":"","thumbPath":"","delete":"false","type":"text","identifier":"","msg":"Anladım"}]"

Answer

You will get SQL syntax error if one of rehberIsmi, jsonData contains single quote.

In your case, composing SQL query by concatenating strings is not a good idea. please use parameters

command.CommandText = @"insert into MessageData values(NULL,$rehberIsmi,$jsonData,$datetime)";
command.Parameters.AddWithValue("$rehberIsmi", rehberIsmi);
command.Parameters.AddWithValue("$jsonData", jsonData);
command.Parameters.AddWithValue("$datetime", DateTime.Now);

see details here https://docs.microsoft.com/en-us/dotnet/standard/data/sqlite/parameters