大约有 40,000 项符合查询结果（耗时：0.0190秒） [XML]
How can I make SQL case sensitive string comparison on MySQL?
... @BT To make utf8 column case sensitive you could use bin colation like: SELECT 'email' COLLATE utf8_bin = 'Email'
– piotrekkr
Apr 23 '13 at 11:43
...
How to put more than 1000 values into an Oracle IN clause [duplicate]
...
Put the values in a temporary table and then do a select where id in (select id from temptable)
share
|
improve this answer
|
follow
|...
SQL/mysql - Select distinct/UNIQUE but return all columns?
...
You're looking for a group by:
select *
from table
group by field1
Which can occasionally be written with a distinct on statement:
select distinct on field1 *
from table
On most platforms, however, neither of the above will work because the behavior o...
Rank function in MySQL
...
One option is to use a ranking variable, such as the following:
SELECT first_name,
age,
gender,
@curRank := @curRank + 1 AS rank
FROM person p, (SELECT @curRank := 0) r
ORDER BY age;
The (SELECT @curRank := 0) part allows the variable initializatio...
MySQL table is marked as crashed and last (automatic?) repair failed
... This was a quick fix! Had a "bad" options table. Make sure that you select the correct database first !
– jyllstuart
Jan 10 '19 at 15:54
add a comment
...
What does “export” do in shell programming? [duplicate]
... are copied - but for any kind of subprocess, not only for subshells. So a mysql process get value from MYSQL_PWD env var, but would have no concept of MYSQL_PWD shell var.
– David Tonhofer
Dec 24 '18 at 15:43
...
How can you determine how much disk space a particular MySQL table is taking up?
...
For a table mydb.mytable run this for:
BYTES
SELECT (data_length+index_length) tablesize
FROM information_schema.tables
WHERE table_schema='mydb' and table_name='mytable';
KILOBYTES
SELECT (data_length+index_length)/power(1024,1) tablesize_kb
FROM information_schema....
ROW_NUMBER() in MySQL
...asy, but actually it kind of isn't).
I often plump for a null-self-join:
SELECT t0.col3
FROM table AS t0
LEFT JOIN table AS t1 ON t0.col1=t1.col1 AND t0.col2=t1.col2 AND t1.col3>t0.col3
WHERE t1.col1 IS NULL;
“Get the rows in the table for which no other row with matching col1,col2 has a hi...
Set operations (union, intersection) on Swift array?
...ing> = Set(array2)
Swift 3.0+ can do operations on sets as:
firstSet.union(secondSet)// Union of two sets
firstSet.intersection(secondSet)// Intersection of two sets
firstSet.symmetricDifference(secondSet)// exclusiveOr
Swift 2.0 can calculate on array arguments:
set1.union(array2) //...
对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
jiulongproxynew# make install
2、安装Apache，squid认证用户设置密码时使用apache的密码管理程序htpasswd
jiulongproxynew# cd /usr/ports/www/apache13
jiulongproxynew# make install
3、下载并安装squid
从http://www.squid-cache.org/Versions/v2/2.6/下载squid-2.6.STABLE1...