-- delete the partition older than INPUT_DAYS days (exclusive) in INPUT_TABLEcreateorreplaceproceduredo_delete_old_partition ( INPUT_TABLEINVARCHAR, INPUT_DAYSINNUMBER )ASBEGINFORPIN(SELECTPARTITION_NAME, HIGH_VALUEFROMUSER_TAB_PARTITIONSWHERETABLE_NAME=INPUT_TABLE) LOOPEXECUTEIMMEDIATE'BEGIN IF TO_...
Alias all columns in a given table Alias column with variable value in SQL Script All MonthNames and Month numbers in sql server All queries combined using a UNION, INTERSECT or EXCEPT operator must have an equal number of expressions in their target lists. all the events in the workload wer...
Re: Max # of columns in a table? Bill Karwin July 05, 2006 09:50PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represen...
check number of columns in a csv file check value exist in an array Check whether a Page is first loading or refreshing? Check whether url or file exist Check white space is available in a string using javascript checkBox checked become unchecked after sorting or paging checkbox list validation...
在函数中使用min和max函数是一种常见的编程技巧,用于获取一组数据中的最小值和最大值。 min函数用于返回一组数据中的最小值。它接受多个参数,可以是数字、字符串或其他可比较的数据类型。例如,对于数...
必须要将MAX_STRING_SIZE 设置为EXTENDED 否则无法使用extended character data type columns 。 之后我们可以创建具体有extended character data type columns 的表了。 当然我们也可以将已有的VARCHAR2, NVARCHAR2, 和RAW字段修改其长度, 具体使用ALTER TABLE MODIFY (COLUMN 命令。在此场景中Oracle将实施块中的长度扩...
create table dates ( number int, date1 datetime, date2 datetime, date3 datetime ) insert into dates values (1, '1/1/2008', '2/4/2008', '3/1/2008') insert into dates values (1, '1/2/2008', '2/3/2008', '3/3/2008') insert into dates values (1, '1/3/2008', '2/2/...
必须要将MAX_STRING_SIZE 设置为EXTENDED 否则无法使用extended character data type columns 。 之后我们可以创建具体有extended character data type columns 的表了。 当然我们也可以将已有的VARCHAR2, NVARCHAR2, 和RAW字段修改其长度, 具体使用ALTER TABLE MODIFY (COLUMN 命令。在此场景中Oracle将实施块中的长度扩...
This topic is related to numbering rows, which I just wrote about (see my articles about MySQL-specific and generic techniques to assign a number to each row in a group). Therefore I’ll use nearly the same table and data as I used in those articles, with the addition of a price col...
I think you will find that a huge number of columns will turn out to be at least as great a performance drag as a standard child table with one row per answer per test. But the only way to know for sure is to benchmark the two designs with representative test data and queries agains...