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postgresql - replace all instances of a string within text field
...g regex replacment. Let's see how easy it is to replace a cat with a dog.
SELECT regexp_replace('Cat bobcat cat cats catfish', 'cat', 'dog');
--> Cat bobdog cat cats catfish
SELECT regexp_replace('Cat bobcat cat cats catfish', 'cat', 'dog', 'i');
--> dog...
How do I check in SQLite whether a table exists?
...sed that FAQ entry.
Anyway, for future reference, the complete query is:
SELECT name FROM sqlite_master WHERE type='table' AND name='{table_name}';
Where {table_name} is the name of the table to check.
Documentation section for reference: Database File Format. 2.6. Storage Of The SQL Database S...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
... well. The problem was that we were taking only a part of the HTML and CSS selectors that were matching in the context of the whole document, which were not matching anymore in the context of an HTML snippet. Since parsing and modifying selectors didn't seem like a good idea, I gave up on this attem...
Postgres: SQL to list table foreign keys
...
You can do this via the information_schema tables. For example:
SELECT
tc.table_schema,
tc.constraint_name,
tc.table_name,
kcu.column_name,
ccu.table_schema AS foreign_table_schema,
ccu.table_name AS foreign_table_name,
ccu.column_name AS foreign_column_nam...
Xcode duplicate/delete line
...ct with the following content and restart Xcode.
{
"^$K" = (
"selectLine:",
"cut:"
);
"^$D" = (
"selectLine:",
"copy:",
"moveToEndOfLine:",
"insertNewline:",
"paste:",
"deleteBackward:"
);
}
This will create two shor...
What are the differences between a clustered and a non-clustered index?
...than a clustered index
Both types of index will improve performance when select data with fields that use the index but will slow down update and insert operations.
Because of the slower insert and update clustered indexes should be set on a field that is normally incremental ie Id or Timestamp.
...
Set database from SINGLE USER mode to MULTI USER
...onnected to it” might be SQL Server Management Studio window itself. Try selecting the master database and running the ALTER query again.
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Remove duplicate rows in MySQL
...ate temporary table tmpTable (id int);
insert into tmpTable
(id)
select id
from YourTable yt
where exists
(
select *
from YourTabe yt2
where yt2.title = yt.title
and yt2.company = yt.company
and yt2.site_id = yt.si...
fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
...t; Configuration Properties > Linker > Advanced > Target Machine. Select MachineX64 if you are targeting a 64 bit build, or MachineX86 if you are making a 32 bit build.
Select Build > Configuration Manager from the main menu in visual studio. Make sure your project has the correct platfo...
How to flatten nested objects with linq expression
...
myBooks.SelectMany(b => b.Chapters
.SelectMany(c => c.Pages
.Select(p => b.Name + ", " + c.Name + ", " + p.Name)));
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