publicstaticintBatchInert(stringconnectionString,stringdesTable,DataTable dt,intbatchSize=500){using(varsbc=newSqlBulkCopy(connectionString,SqlBulkCopyOptions.UseInternalTransaction){BulkCopyTimeout=300,NotifyAfter=dt.Rows.Count,BatchSize=batchSize,DestinationTableName=desTable}){foreach(DataColumn column i...
After you create a table, you can start interacting with it. To add a row, use theInsertmethod on theSQLiteConnectioninstance and provide an object of the appropriate type that holds the data to be inserted. The following code shows how to add a new row to theUsertable: C#Copy publicint...
String sql= rawSQL+" Limit "+String.valueOf(TableRowCount)+" Offset "+String.valueOf(pageID*TableRowCount); curTable = db.rawQuery(sql,null); gvTable.setNumColumns(curTable.getColumnCount());//表现为表格的关键点! TableColCount=curTable.getColumnCount(); srcTable.clear(); // 取得字段名称...
public class MyConnDB : SQLiteConnection { public TableQuery<Card_log> Card_log { get { return this.Table<Card_log>(); } } public TableQuery<Card_no> Card_no { get { return this.Table<Card_no>(); } } public MyConnDB(string dbPath) : base(dbPath) { // CreateTable<Card_log>(...
COUNT SELECT COUNT(column_name) FROM table_name WHERE CONDITION; DELETE DELETE FROM table_name WHERE {CONDITION}; INSERT INTO INSERT INTO table_name( column1, column2...columnN) VALUES ( value1, value2...valueN); IN SELECT column1, column2...columnN FROM ...
EXEC sp_tableoption 'mytable', 'large value types out of row', '1' 1. 考虑垂直分区。如果表中一些列访问的比其它列频繁地多,把很少使用的列存放在另一张表中。访问频繁访问的列会更快,代价是当访问不经常访问的列时,需要使用JOIN。 1.
int main(int argc, char *argv[]) { sqlite3* open_db = open_database("./database.db"); if (open_db != false) { bool create_table_ref; // 运行插入记录 if (create_table_ref == true) { bool insert_ref = 0; insert_ref = insert_data(open_db, "insert into LySharkDB(id,name...
GetJniTypeName(IJavaPeerable) Gets the JNI name of the type of the instanceself. JavaAs<TResult>(IJavaPeerable) Try to coerceselfto typeTResult, checking that the coercion is valid on the Java side. TryJavaCast<TResult>(IJavaPeerable, TResult) ...
If you omit where function in get_all it will return all objects from a table:auto allUsers = storage.get_all<User>();Also you can use remove_all function to perform DELETE FROM ... WHERE query with the same type of conditions.storage.remove_all<User>(where(c(&User::id) < 100))...
+ rowIndex); } returnresult; } publicTodoItem getToDoItem(longrowIndex) throwsSQLException { Cursor cursor=mDb.query(DATABASE_TABLE, newString[]{KEY_ID,KEY_TASK,KEY_CREATION_DATE}, KEY_ID+"="+rowIndex,null,null,null,null); if(cursor.getCount()==0|| !cursor.moveToFirst()){ ...