大约有 40,000 项符合查询结果（耗时：0.0335秒） [XML]
Adding a new value to an existing ENUM Type
I have a table column that uses an enum type. I wish to update that enum type to have an additional possible value. I don't want to delete any existing values, just add the new value. What is the simplest way to do this?
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Difference between a theta join, equijoin and natural join
...uijoin will also remove the equality column if they have same name in both tables.
– Vishal R
Nov 13 '14 at 3:42
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sqlalchemy: how to join several tables by one query?
...teger primary keys for everything, but whatever):
class User(Base):
__tablename__ = 'users'
email = Column(String, primary_key=True)
name = Column(String)
class Document(Base):
__tablename__ = "documents"
name = Column(String, primary_key=True)
author_email = Column(String,...
Database, Table and Column Naming Conventions? [closed]
...chema names for the organization of database objects.
Singular names for tables
Singular names for columns
Schema name for tables prefix (E.g.: SchemeName.TableName)
Pascal casing (a.k.a. upper camel case)
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How to remove constraints from my MySQL table?
I want to remove constraints from my table. My query is:
12 Answers
12
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MySQL > Table doesn't exist. But it does (or it should)
...ved correctly except for one.
I can connect and USE the database. SHOW TABLES also returns me all the tables correctly, and the files of each table exists on the MySQL data directory.
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SQL Add foreign key to existing column
If I am using the following SQL command in SQL Server 2008 to update a table with a foreign key constraint:
6 Answers
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Inserting multiple rows in mysql
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it's also possible to use INSERT INTO Table SELECT 1, '14/05/2012', 3 UNION SELECT 2, '05/14/2012', 3. of course, this will only be better of the inserted values are coming from different tables.
– Zohar Peled
Jun 1 '15 at 9...
Grid of responsive squares
...bove.
With this technique, you can make any other aspect ratio, here is a table giving the values of bottom padding according to the aspect ratio and a 30% width.
Aspect ratio | padding-bottom | for 30% width
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1:1 | = width |...
SQLAlchemy - Getting a list of tables
...y information about this in the documentation, but how can I get a list of tables created in SQLAlchemy?
9 Answers
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