create or replace procedure p_RowsToCols(as_sql in varchar2 --源数据的查询sql ,as_sql_cols in varchar2 --动态转换列的查询sql,要求转为列的那列,字段名必须为cols,支持排序 ,as_aggCol in varchar2 --对应pivot函数的 聚合函数 ,as_changeCol in varchar2 --源数据中,要转为列的字段名 ,as_v...
create or replace procedure p_RowsToCols(as_sql in varchar2 --源数据的查询sql ,as_sql_cols in varchar2 --动态转换列的查询sql,要求转为列的那列,字段名必须为cols,支持排序 ,as_aggCol in varchar2 --对应pivot函数的 聚合函数 ,as_changeCol in varchar2 --源数据中,要转为列的字段名 ,as_v...
1 select*fromuser_tab_columns Oracle 11g 行列互换 pivot 和 unpivot 说明 在Oracle 11g中,Oracle 又增加了2个查询:pivot(行转列) 和unpivot(列转行) 参考:http://blog.csdn.net/tianlesoftware/article/details/7060306、http://www.oracle.com/technetwork/cn/articles/11g-pivot-101924-zhs.html google 一...
selectid,substr(str,2)strfromtestmodelreturnupdatedrowspartitionby(id)dimensionby(row_number()over(partitionbyidorderbyname)asrn)measures(cast(nameasvarchar2(20))asstr)rulesupsertiterate(3)until(presentv(str[iteration_number+2],1,0)=0)(str[0]=str[0]||','||str[iteration_number+1])orderb...
Thepivot_clauseletsyou write cross-tabulation queries that rotate rows into columns, aggregatingdata in the process of the rotation. The output of a pivot operation typicallyincludes more columns and fewer rows than the starting data set.Thepivot_clauseperforms the following steps: ...
dbms_stats.gather_table_stats(user,'CHAINED_ROWS',method_opt=>'for all columns size auto',estimate_percent=>100); execute immediate 'create table CHAINED_ROWS_'||to_char(sysdate,'yyyymmdd_hh24miss')||' as select * from chained_rows'; ...
user_col_comments;表字段注释(列注释) user_col_comments视图显示已经为表中的列输入的注释。这些注释通过comment命令添加到数据库中。user_col_comments视图包含3 列: Table_Name 表名或视图名 Column_Name 列名 Comments 已经为该列输入的注释 本文参与 腾讯云自媒体同步曝光计划,分享自微信公众号。 原始发表:2020...
Oracle SQL - pivoting one row of several columns into one column of several rows Oracle Tips by Burleson Consulting There are many ways to use Oracle to pivot column data for display on a single row: 0 - Download SQL into Excel spreadsheet pivot table ...
Select table_name,num_rows,last_analyzed,stale_stats from dba_tab_statistics where table_name=’TEST’; 好了统计信息就说到这里了,下面来进入到今天的主题:执行计划。 二、执行计划 执行计划:一条 SQL 语句在数据库中的访问路径或者执行过程的描述。Oracle 通过优化器Optimizer(这里的优化器是指基于代价的优...
v_tabname from dual; stmt := 'select count(*) from "' || v_owner || '"."' || v_tabname || '"'; EXECUTE IMMEDIATE stmt INTO num_rows; EXECUTE IMMEDIATE 'insert into table_count values('''||v_owner||''','''||v_tabname||''','''||to_number(num_rows)||''')'; ...