大约有 40,000 项符合查询结果（耗时：0.0272秒） [XML]
How to ALTER multiple columns at once in SQL Server
I need to ALTER the data types of several columns in a table.
13 Answers
13
...
What is a proper naming convention for MySQL FKs?
...tically.
In any case, this is the convention that I use:
fk_[referencing table name]_[referenced table name]_[referencing field name]
Example:
CREATE TABLE users(
user_id int,
name varchar(100)
);
CREATE TABLE messages(
message_id int,
user_id int
);
ALTER TABLE me...
How to copy a row and insert in same table with a autoincrement field in MySQL?
... row with an autoincrement column ID=1 and insert the data into same table as a new row with column ID=2 .
13 Answer...
CSS table layout: why does table-row not accept a margin?
...
See the CSS 2.1 standard, section 17.5.3. When you use display:table-row, the height of the DIV is solely determined by the height of the table-cell elements in it. Thus, margin, padding, and height on those elements have no effect.
http://www.w3.org/TR/CSS2/tables.html
...
Drop all tables whose names begin with a certain string
How can I drop all tables whose names begin with a given string?
14 Answers
14
...
List of foreign keys and the tables they reference
...ying to find a query which will return me a list of the foreign keys for a table and the tables and columns they reference. I am half way there with
...
How do I migrate a model out of one django app and into a new one?
...rd code
#to use just one sentence:
def forwards(self, orm):
db.rename_table('common_cat', 'specific_cat')
if not db.dry_run:
# For permissions to work properly after migrating
orm['contenttypes.contenttype'].objects.filter(
app_label='common',
model...
Rename MySQL database [duplicate]
...p; paste this snippet:
mysql -e "CREATE DATABASE \`new_database\`;"
for table in `mysql -B -N -e "SHOW TABLES;" old_database`
do
mysql -e "RENAME TABLE \`old_database\`.\`$table\` to \`new_database\`.\`$table\`"
done
mysql -e "DROP DATABASE \`old_database\`;"
...
Most efficient way to determine if a Lua table is empty (contains no entries)?
What's the most efficient way to determine if a table is empty (that is, currently contains neither array-style values nor dict-style values)?
...
How to change the name of a Django app?
...views.py, urls.py , 'manage.py' , and settings.py files.
Edit the database table django_content_type with the following command: UPDATE django_content_type SET app_label='<NewAppName>' WHERE app_label='<OldAppName>'
Also if you have models, you will have to rename the model tables. For ...