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PostgreSQL delete all content
....3/static/sql-delete.html
TRUNCATE is a PostgreSQL extension that provides a faster mechanism to
remove all rows from a table. TRUNCATE quickly removes all rows from a
set of tables. It has the same effect as an unqualified DELETE on each
table, but since it does not actually scan the tab...
AlertDialog.Builder with custom layout and EditText; cannot access view
...rence of alertDialog
EditText editText = (EditText) alertDialog.findViewById(R.id.label_field);
Update:
Because in code line dialogBuilder.setView(inflater.inflate(R.layout.alert_label_editor, null));
inflater is Null.
update your code like below, and try to understand the each code line
Ale...
How do I specify unique constraint for multiple columns in MySQL?
... That way combination of three would be unique? Or all individual three columns would be unique?
– Gary Lindahl
Sep 15 '11 at 0:03
100
...
Oracle: how to UPSERT (update or insert into a table?)
... and the update where another process could successfully fire a delete. I did however use this pattern on a table that never has deletes fired against it.
– chotchki
Sep 29 '11 at 22:50
...
How do I make and use a Queue in Objective-C?
...tableArray+QueueAdditions.h
@interface NSMutableArray (QueueAdditions)
- (id) dequeue;
- (void) enqueue:(id)obj;
@end
NSMutableArray+QueueAdditions.m
@implementation NSMutableArray (QueueAdditions)
// Queues are first-in-first-out, so we remove objects from the head
- (id) dequeue {
// if ([...
How to have an automatic timestamp in SQLite?
...
Just declare a default value for a field:
CREATE TABLE MyTable(
ID INTEGER PRIMARY KEY,
Name TEXT,
Other STUFF,
Timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
);
However, if your INSERT command explicitly sets this field to NULL, it will be set to NULL.
...
Differences between cookies and sessions?
...
Sessions are server-side files that contain user information, while Cookies are client-side files that contain user information. Sessions have a unique identifier that maps them to specific users. This identifier can be passed in the URL or saved...
How to change max_allowed_packet size
...on. He made a mistake of putting it at the bottom of the file first so it did not work.
6) Control + O (save) then ENTER (confirm) then Control + X (exit file)
7) service mysqld restart
8) You can check the change in the variables section on phpmyadmin
...
Check if a temporary table exists and delete if it exists before creating a temporary table
...e the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
...
How can I use Spring Security without sessions?
...y 3 with Java Config, you can use HttpSecurity.sessionManagement():
@Override
protected void configure(final HttpSecurity http) throws Exception {
http
.sessionManagement()
.sessionCreationPolicy(SessionCreationPolicy.STATELESS);
}
...