Sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id Sys.indexes i ON t.OBJECT_ID = i.object_id (sum(a.data_pages) * 8) / 1024 as DataSpaceMB (sum(a.used_pages) * 8) / 1024 as UsedSpaceMB, (sum(a.total_pages) * 8) / 1024 as TotalSpaceMB, So I thought I might post it here since this came up when searching for the original SQL I'd just like to start off by saying that I'm not the original author of this but I've used it over and over again. You can read into more detail on statements like these in the official SQLite documentation.Post by JoshKC on Tue 20:32. Within the statements mentioned, like CREATE TABLE and DROP TABLE, many additional parameters that can be considered depending on the use case. The commands walked through are some of the most basic to get started with SQLite and allow you to start organizing and structuring your data. This article covers the basics of creating and dropping databases and tables in SQLite. This action will make the database no longer accessible. SQLite is an embedded database engine, so in order to drop a database you have to delete the file from the machine. Dropping a databaseīecause SQLite does not have a separate server process like other relational databases such as MySQL or PostgreSQL, there is not a need for a DROP DATABASE statement. If it does not exist, then the statement is simply ignored and nothing happens. The behavior it adds makes sure that the command only runs if the table exists. The IF EXISTS statement is optional when dropping a table. Adjusting the previous example will look like this to create the table in test: in your statement to create the table in a database other than main. If you have multiple connections open to databases, you need to specify. It is important to note that the CREATE TABLE statement will create the table you specify in the main database by default. In our example, the addition of PRIMARY KEY to the id field is an example of a table constraint. There is an exception if the constraint affects the interaction of multiple columns instead of a singular column.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |