大约有 6,100 项符合查询结果（耗时：0.0194秒） [XML]
SQL中使用update inner join和delete inner join；Oracle delete join替代...
...> 0
and mw.size > 1;
下面是Oracle的：
Sql代码
DELETE TABLE1 where KHID exists ( select KHID from table2 where FWDWID=8)
Sql代码
DELETE TABLE1 where exists ( select 1 from table2 where and table1.khid=table2.khid and FWDWID=8);
Oracle的delete与join如何使用
...
[url]https://www.digitalocean.com/community/tutorials/how-to-style-a-t...
https://www.digitalocean.com/com ... le-a-table-with-css
表格样式借鉴到主页。
unresolved reference to object [INFORMATION_SCHEMA].[TABLES]
I've created a UDF that accesses the [INFORMATION_SCHEMA].[TABLES] view:
3 Answers
3...
How can I select rows with most recent timestamp for each key value?
I have a table of sensor data. Each row has a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
...
Database Design for Tagging
...e fine and scale out assuming the right b-tree indexes exist on the middle table
– Adam Musch
Feb 24 '10 at 16:41
...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
...
Here is a simple way without stragg or creating a function.
create table countries ( country_name varchar2 (100));
insert into countries values ('Albania');
insert into countries values ('Andorra');
insert into countries values ('Antigua');
SELECT SUBSTR (SYS_CONNECT_BY_PATH (country_na...
String replacement in batch file
...ABLEDELAYEDEXPANSION switch set.
setlocal ENABLEDELAYEDEXPANSION
set word=table
set str="jump over the chair"
set str=%str:chair=!word!%
share
|
improve this answer
|
follo...
Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...
Use the date function:
select date(timestamp_field) from table
From a character field representation to a date you can use:
select date(substring('2011/05/26 09:00:00' from 1 for 10));
Test code:
create table test_table (timestamp_field timestamp);
insert into test_table (tim...
How to check which locks are held on a table
...
You can find current locks on your table by following query.
USE yourdatabase;
GO
SELECT * FROM sys.dm_tran_locks
WHERE resource_database_id = DB_ID()
AND resource_associated_entity_id = OBJECT_ID(N'dbo.yourtablename');
See sys.dm_tran_locks
If multip...
How to count TRUE values in a logical vector
...values.
See for example:
z <- c(TRUE, FALSE, NA)
sum(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(whi...