当您仍然需要第一个结果集时，您正在重用同一个游标来执行更多sql：
在SQL中,`fetch`是一个用来获取查询结果行的命令。使用`fetch`命令通常需要搭配`SELECT`语句和`FROM`语句。在查询结果集返回多行的情况下,可以使用`fetch`命令来逐行获取数据。具体的语法是: ``` FETCH {FIRST | NEXT} [num] {ROW | ROWS} ONLY ``` 其中,`FIRST`和`NEXT`关键字用来指定获取的是第一行...
sql ="select claim_id from info where claim_no = '4201820330114401021497'"#需要先执行sql语句ifcursor.execute(sql):#得到返回值jilu,jilu是一个元组jilu =cursor.fetchone()#通过下标取出值即可print('对应的id是:', jilu[0])else:print('没有对应的id') 这样我们就得到这个了,fetchone是取出一个,得到...
Declaration of the cursor which will sequentially process each row one at a time Opening of the declared cursor Fetching one row at a time Closing the cursor on the termination condition, i.e. on reaching the last row in the count of rows to be processed (as mentioned as a part of the...
mysql_fetch_assoc($result)这个函数是从结果集中取出一条记录作为关联数组返回,不能直接传sql,因为fetchOne是咱们自己封装的函数,所以直接传的是sql语句,你可以看下封装fetchOne里面的内容,是先通过mysql_query($sql)执行了下sql,如果有记录的话,返回的是结果集,在通过mysql_fetch_assoc($result)这个结果集得到一...
mssql_fetch_row— Get row as enumerated arrayWarning This function was REMOVED in PHP 7.0.0. Alternatives to this function include: PDOStatement::fetch() sqlsrv_fetch_array() odbc_fetch_row()说明 mssql_fetch_row ( resource $result ) : array mssql_fetch_row() fetches one row of ...
这里的查询命令和SQL Sever中的命令格式是一样的,只需将查询命令写入引号中即可。 cour.execute('SELECT * FROM number') 1. 第三步. 输出查询结果。 这里给大家看一下要查询的数据表(number)的内容: 第一种方式 row = cour.fetchone()while row:print('%s,%s,%s' % (row[0],row[1],row[2]))row...
SQLFetch fetches the next rowset of data from the result set and returns data for all bound columns. Syntax C++ Copy SQLRETURN SQLFetch( SQLHSTMT StatementHandle); Arguments StatementHandle [Input] Statement handle. Returns SQL_SUCCESS, SQL_SUCCESS_WITH_INFO, SQL_NO_DATA, SQL_STILL_EXECUTI...
When the Transact-SQL DECLARE cursor extensions are used, these rules apply: If eitherFORWARD_ONLYorFAST_FORWARDis specified,NEXTis the onlyFETCHoption supported. IfDYNAMIC,FORWARD_ONLYorFAST_FORWARDare not specified, and one ofKEYSET,STATIC, orSCROLLare specified, allFETCHoptions are supported. ...
I am trying to insert into a temporary table but only the first n number of rows. I thought I could use the combination of insert into and fect first row command ,but it won't work. Does anyone know why? > Any other suggestions other than writing a loop? This is in a db2 sql ...