標籤:最近做資料分析,需要用到累加功能,發現強大的oracle還真有,用over(order by field)例子:資料表中最後一列就是累加的效果累加sql:select t.acc_pedal_pos,count(*) num,sum(count(*)) over(order by t.acc_pedal_pos) accu_sum from GT1117CARDATA t where t.acc_pedal_pos>0 group by
標籤:I see a lot of questions on shared file systems that can be used when people move from single instance to Oracle RAC database and Grid Infrastructure. The most common question is the following: “Should I place archive logs in OCFS2 or ASM
標籤:認證考試 恩墨學院 oracle 11g ocp題庫解析 oracle ocp認證考試 QUESTION 1You notice that the performance of the database has degraded because of frequent checkpoints.Which two actions resolve the
標籤:oracle 11g ocp題庫解析 認證考試 恩墨學院 甲骨文 oracle ocp認證考試 QUESTION 2Identify the memory component from which memory may be allocated for:Session memory for the shared
標籤: 認識分析函數分析函數是什嗎? 分析函數是oracle專門用於解決複雜報表統計需求的功能強大的函數,它可以在資料中進行分組然後計算基於組的某種統計值,並且每一組的每一行都可以返回一個統計值。分析函數和彙總函式的不同之處是什嗎? 普通的彙總函式用group by 分組,每個分組返回一個統計值,而分析函數採用partition by
標籤:【一】配置ODBCwin7 :控制台(查看方式:小表徵圖)→管理工具→資料來源(ODBC)在【ODBC資料來源管理器】面板下,在預設【使用者DNS】下,單擊【添加】按鈕選擇【Oracle in OraClient11g_home1】(前提是你已經安裝了Oracle11g的用戶端),設定【Data Source Name】為【xxx】,選擇【TNS service name】,通過【test
標籤:create or replace procedure testwzm(v_gdjdm in varchar2) isv_id varchar2(10);v_xlname varchar2(100);v_count number(4);beginv_count:=0;//定義遊標declare cursor line_cur isselect line_code,line_name from ods_yx.line where gdjdm=v_gdjdm and rownum<1