1. mysql> call test_cursor(3,@test); 2. Query OK, 0 rows affected (0.00 sec) 3. 4. mysql> select @test; //这里很像php中的,传引用 5. +---+ 6. | @test | 7. +---+ 8. | ying,ying | 9. +---+ 10. 1 row in set (0.00 sec) 11. 12. mysql> call test_cursor(''...
带参数的游标使用如下: vtmp 可以不声明--vtmp c%rowtype; (for循环中in cursorName即自动设置了vtmp的类型,for循环外部无需声明) 这一点类似于JAVA的增强for循环: 下面例子摘录自:http://www.cnblogs.com/mengdd/archive/2013/01/21/2870019.html int [] arr={0,1,2,3,4,5}; for(int element:ar...
External row updates and inserts are visible, and deletes appear as transient missing data in the current fetch buffer.N/AN/A Integer value = 1006. Application must see changed data for existing rows, and see inserted and deleted rows during the lifetime of the cursor. ...
O_Result OutVarChar2)isv_cur_info staff%rowtype;cursorv_cur(v_id staff.id%type)is--声明游标 为staff表的数据集select*fromstaffwhereid=v_id; --参数:v_idbeginopenv_cur(1);--打开游标fetchv_curintov_cur_info;--赋值给游标O_Result:='ID:'||v_cur_info.id||',Name:'||v_cur_info.n...
sqlite3.connect('example.db') # 创建一个游标对象 cursor = conn.cursor() # 执行查询 cursor.execute('SELECT * FROM table_name') # 获取查询结果 results = cursor.fetchall() # 遍历查询结果 for row in results: # 在这里进行相应的操作 print(row) # 关闭游标和连接 cursor.close() conn.close...
witharcpy.da.UpdateCursor(input_test, ['OID@','SHAPE@', sindex])ascursor:forrowincursor: oid = row[0] shape = row[1]ifshape.isMultipart:# isMultipart returns True/False, so you don't need to evaluate if True is True# do not calculate/update sindex;arcpy.AddError('There...
Cursor 示例 1 使用搜索游标查看行中的字段值。 importarcpy# Set the workspacearcpy.env.workspace="c:/base/data.gdb"# Create the search cursorcursor=arcpy.SearchCursor("roads",'"TYPE" <> 4')# Iterate through the rows in the cursorforrowincursor:print("Name: {0}, CFCC code: {1}".format...
在调用了moveToInsertRow之后,如果对结果集调用了除 get<类型>、update<类型> 和游标定位方法(包括moveToCurrentRow)之外的任何其他方法,则将引发异常。 moveToInsertRow 方法有效地将结果集置于插入模式,而游标定位方法会终止插入模式。 相对的游标定位调用会将游标在调用 moveToInsertRow 之前它所处的相对位置进行移...
CURSOR CUR_FIRST_INDEX IS SELECT A.ID A_ID, --一级指标ID A.INDEXNAME A_INDEXNAME --一级指标名称 FROM INDEX_A A ORDER BY A_ID; /*定义游标变量,该变量的类型为基于游标CUR_FIRST_INDEX的行记录*/ ROW_CUR_FIRST_INDEX CUR_FIRST_INDEX%ROWTYPE; ...
defexecute_query(connection):try:cursor=connection.cursor()cursor.execute("SELECT * FROM your_table")result=cursor.fetchall()forrowinresult:print(row)cursor.close()connection.close()except mysql.connector.Erroraserr:print("查询数据失败:",err)exit()# 运行示例代码if__name__=='__main__':# 连...