大约有 41,000 项符合查询结果（耗时：0.0419秒） [XML]
How to delete from select in MySQL?
...
SELECT (sub)queries return result sets. So you need to use IN, not = in your WHERE clause.
Additionally, as shown in this answer you cannot modify the same table from a subquery within the same query. However, you can either...
Receiving “fatal: Not a git repository” when attempting to remote add a Git repo
...nd then I did this:
echo 'ref: refs/heads/ML_#94_FILTER_TYPES_AND_SPECIAL_CHARS' > .git/HEAD
It worked.
share
|
improve this answer
|
follow
|
...
Case in Select Statement
I have an SQL statement that has a CASE from SELECT and I just can't get it right. Can you guys show me an example of CASE where the cases are the conditions and the results are from the cases. For example:
...
Search for selection in vim
...
Check this Vim tip: Search for visually selected text
Or you can simply yank the selected text with y and go to search mode /, then you can paste the last yanked text with Ctrl+R 0
share
...
Disable all table constraints in Oracle
...nk about putting constraint_type in the WHERE clause.
BEGIN
FOR c IN
(SELECT c.owner, c.table_name, c.constraint_name
FROM user_constraints c, user_tables t
WHERE c.table_name = t.table_name
AND c.status = 'ENABLED'
AND NOT (t.iot_type IS NOT NULL AND c.constraint_type = 'P')
ORD...
SQL Server - SELECT FROM stored procedure
...le result sets, each with its own schema. It's not suitable for using in a SELECT statement.
share
|
improve this answer
|
follow
|
...
Regular expression to match a line that doesn't contain a word
...ould do), but still, it is possible.
And if you need to match line break chars as well, use the DOT-ALL modifier (the trailing s in the following pattern):
/^((?!hede).)*$/s
or use it inline:
/(?s)^((?!hede).)*$/
(where the /.../ are the regex delimiters, i.e., not part of the pattern)
If t...
How to check if a table exists in a given schema
... whether a table (or view) exists, and the current user has access to it?
SELECT EXISTS (
SELECT FROM information_schema.tables
WHERE table_schema = 'schema_name'
AND table_name = 'table_name'
);
The information schema is mainly useful to stay portable across major versions and...
Glorified classes in the Java language
...
@aioobe: exactly. Note that you also have int.class, char.class, etc.
– Michael Borgwardt
Aug 11 '10 at 13:19
add a comment
|
...
Rails 3: Get Random Record
...You can use the following trick on an indexed column (PostgreSQL syntax):
select *
from my_table
where id >= trunc(
random() * (select max(id) from my_table) + 1
)
order by id
limit 1;
share
|
...