1,判断表是否存在：
SELECT name, sql FROM sqlite_master WHERE type="table" AND name = "Dom"
结果如下：
2.判断视图是否存在：
SELECT count(*) FROM sqlite_master WHERE type = "view" AND name = "myView"
结果如下：
type='view'判断视图.结果>0就是有这个视图
另附C#操作的常用代码：
DataTable table = conn.GetSchema("TABLES"); if (table != null && table.Rows.Count > 0) { string tableName = table.Rows[0]["TABLE_NAME"].ToString(); DataTable schemaTable = GetReaderSchema(tableName, conn); }
private DataTable GetReaderSchema(string tableName, SQLiteConnection connection) { DataTable schemaTable = null; IDbCommand cmd = new SQLiteCommand(); cmd.CommandText = string.Format("select * from [{0}]", tableName); cmd.Connection = connection; using (IDataReader reader = cmd.ExecuteReader(CommandBehavior.KeyInfo | CommandBehavior.SchemaOnly)) { schemaTable = reader.GetSchemaTable(); } return schemaTable; }
foreach (DataRow dr in schemaTable.Rows) { ColumnInfo info = new ColumnInfo(); info.Name = new NameElement(dr["ColumnName"].ToString()); info.Ordinal = Convert.ToInt32(dr["ColumnOrdinal"].ToString()); info.AllowDBNull = (bool)dr["AllowDBNull"]; info.MaxLength = Convert.ToInt32(dr["ColumnSize"].ToString()); info.DataTypeId = Convert.ToInt32(dr["ProviderType"].ToString()); info.DataType = dr["DataTypeName"].ToString().Trim(); info.AutoIncrement = (bool)dr["IsAutoIncrement"]; info.IsPrimaryKey = (bool)dr["IsKey"]; info.Unique = (bool)dr["IsUnique"]; info.IsReadOnly = (bool)dr["IsReadOnly"]; string netType = dr["DataType"].ToString(); list.Add(info.Name.Name.ToString(), info); }