原创 Oracle_071_lesson_p13
創建序列、同義詞、索引 create sequenceCREATE SEQUENCE [ schema. ] sequence[ { START WITH|INCREMENT BY } integer| { MAXVALUE integer
原创 Oracle_071_lesson_p2
SQL developer 登錄 Xmanager 顯示端口0.0連接->可直接拖表到右邊窗口 hr/hr schemaselect 語法select from dual;select {distinct column | al
原创 Oracle_071_lesson_p15
Managing Schema Objects管理模式對象 you should be able to: 1、Manage constraints 2、Create and use temporary tables3、Create and
原创 Oracle_071_lesson_p6
分組函數Group functions avg 求平均count 求數量max 求值可針對數字,日期,字符min 求值可針對數字,日期,字符sum 求總和listaggstddevvariance count詳解: count(*)將
原创 Oracle_071_lesson_p20
Managing Data in Different Time Zones 管理數據在不同的時區 you should be able to:1、Use data types similar to DATE that store fract
原创 Oracle_071_lesson_p22
Hierarchical Retrieval 層次檢索 you should be able to:1、Interpret the concept of a hierarchical query2、Create a tree-structu
原创 Oracle_071_lesson_p18
Controlling User Access 控制用戶訪問 you should be able to do the following:1、Differentiate system privileges from object priv
原创 Oracle_071_lesson_p19
Manipulating Data 數據操作 you should be able to:1、Specify explicit default values in the INSERT and UPDATE statements2、Desc
原创 Oracle_071_lesson_p16
Retrieving Data by Using Subqueries 子查詢 you should be able to:1、Write a multiple-column subquery 多列子查詢2、Use scalar subq
原创 Oracle_071_lesson_p21
Generating Reports by Grouping Related Data使用分組生成報告 you should be able to use the:1、ROLLUP operation to produce subtota
原创 Oracle_071_lesson_p17
Manipulating Data by Using Subqueries 使用子查詢控制數據 you should be able to:1、Use subqueries to manipulate data2、Insert values
原创 Oracle_052_lesson_p3
Creating an Oracle Database Using DBCA 使用DBCA創建數據庫 oracle 用戶下 DBCA建庫,SID最大8位小文件表空間的最大存儲:8K * 4M的塊=32G
原创 Oracle_071_lesson_p9
集合操作 UNION 及 UNION ALLUNION :列名,數據類型要一致,結果會默認ASC自動排序UNION ALL :結果不會去重,不排序,其他和UNION一樣用類似to_char(null), to_number(null), t
原创 Oracle_052_lesson_p2
Installing Oracle Software 安裝Oracle軟件 一般先安裝GI,在安裝DB。版本查詢 metalink.oracle.com mos文件 1、在root用戶中執行腳本echo "192.168.1
原创 Oracle_linux_lesson_p2
用戶和組 組:groupadd -g 1100 dbagroupadd -g 1200 oinstall 用戶useradd -u 1100 -g 1200 -G 1100 -d /home/oracle oracle 查看oracle用