大约有 5,880 项符合查询结果（耗时：0.0367秒） [XML]
Drop a temporary table if it exists
I have two lines of code in SQL that create two tables on the fly, i need to do something like
3 Answers
...
ActiveRecord: List columns in table from console
I know that you can ask ActiveRecord to list tables in console using:
8 Answers
8
...
ALTER TABLE to add a composite primary key
I have a table called provider . I have three columns called person , place , thing . There can be duplicate persons, duplicate places, and duplicate things, but there can never be a dupicate person-place-thing combination.
...
What are the performance characteristics of sqlite with very large database files? [closed]
...application).
The tests involve a single sqlite file with either a single table, or multiple tables. Each table had about 8 columns, almost all integers, and 4 indices.
The idea was to insert enough data until sqlite files were about 50GB.
Single Table
I tried to insert multiple rows into a sqli...
How do I set the table cell widths to minimum except last column?
I have a table with 100% width. If I put <td> s in it, they get spread out with equal length columns. However, I want all the columns except last to have as small a width as possible, without wrapping text.
...
SQL Server SELECT INTO @variable?
...
You cannot SELECT .. INTO .. a TABLE VARIABLE. The best you can do is create it first, then insert into it. Your 2nd snippet has to be
DECLARE @TempCustomer TABLE
(
CustomerId uniqueidentifier,
FirstName nvarchar(100),
LastName nvarchar(100),
...
mysql update column with value from another table
I have two tables, both looking like
8 Answers
8
...
Equal sized table cells to fill the entire width of the containing table
...th relative sizing) to make a row of cells stretch the entire width of the table within which it is contained?
3 Answers
...
How do I change db schema to dbo
I imported a bunch of tables from an old sql server (2000) to my 2008 database. All the imported tables are prefixed with my username, for example: jonathan.MovieData . In the table properties it lists jonathan as the db schema. When I write stored procedures I now have to include jonathan....
How to copy from CSV file to PostgreSQL table with headers in CSV file?
I want to copy a CSV file to a Postgres table. There are about 100 columns in this table, so I do not want to rewrite them if I don't have to.
...