alter-table
SQL Error Alter Table?
I have been trying to add columns to a table using some logic that produces this statement: ALTER TABLE Master_List[详细]
2023-01-04 09:19 分类:问答How to add a default value to an already existing column?
I have an existing column in my SQL Server database. I have tried about everything I can think of but can not get a default value to be added to the column. What work开发者_Python百科s in every other[详细]
2023-01-03 22:42 分类:问答How do I drop 'NOT NULL' from a column in MySQL?
A show create table command shows the following: \'columnA\' varchar(6) NOT NULL DEFAULT \'\'; How do I modify that column so that the not null is removed?[详细]
2023-01-03 06:07 分类:问答T-SQL Add Column In Specific Order
Im a bit new to T-SQL, Coming from a MySQL background Im still adapting to the different nuances in the syntax.[详细]
2023-01-02 08:58 分类:问答I need to alter a sqlite3 table to add FTS3
I need the ability to add F开发者_开发问答TS3 to a sqlite3 table after it was created, not as it is created.Does anyone know the ALTER syntax to accomplish this?SQLite does not support altering a tabl[详细]
2023-01-01 01:55 分类:问答How to convert a table column to another data type
I have a column with the type of Varchar in my Postgres database which I meant to be integers... and now I want to change them, unfortunately this doesn\'t seem to work using my rails migration.[详细]
2022-12-31 09:52 分类:问答SQLite Modify Column
I need to modify a column in a SQLite database but I have to do it programatically due to the database already being in production.From my research 开发者_如何学运维I have found that in order to do th[详细]
2022-12-28 05:05 分类:问答Resetting AUTO_INCREMENT on myISAM without rebuilding the table
Please help I am in major trouble with our production database. I had acci开发者_StackOverflow社区dentally inserted a key with a very large value into an autoincrement column, and now I can\'t seem to[详细]
2022-12-28 05:00 分类:问答How to change a primary key in SQL to auto_increment?
I have a table in MySQL that has a primary key: mysql> desc gifts; +---------------+-------------+------+-----+---------+-------+[详细]
2022-12-27 20:25 分类:问答Deleting Duplicates in MySQL
Query was this: CREATE TABLE `query` ( `id` int(11) NOT NULL auto_increment, `searchquery` 开发者_开发知识库varchar(255) NOT NULL default \'\',[详细]
2022-12-27 01:36 分类:问答