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When do I need to use a semicolon vs a slash in Oracle SQL?
....2.0.1.0 - Production
With the Partitioning and OLAP options
SQL> drop table foo;
Table dropped.
SQL> /
drop table foo
*
ERROR at line 1:
ORA-00942: table or view does not exist
In this case one actually notices the error.
But assuming there is a SQL script like this:
drop...
Postgres: How to do Composite keys?
... error, and omit the redundant CONSTRAINT (already implied), too:
CREATE TABLE tags
(
question_id INTEGER NOT NULL,
tag_id SERIAL NOT NULL,
tag1 VARCHAR(20),
tag2 VARCHAR(20),
tag3 VARCHAR(20),
PRIMARY ...
What are DDL and DML?
... the database.
CREATE – to create database and its objects like (table, index, views, store procedure, function and triggers)
ALTER – alters the structure of the existing database
DROP – delete objects from the database
TRUNCATE – remove all records from a table, including all ...
How to change collation of database, table, column?
...
You need to either convert each table individually:
ALTER TABLE mytable CONVERT TO CHARACTER SET utf8mb4
(this will convert the columns just as well), or export the database with latin1 and import it back with utf8mb4.
...
How to assign an exec result to a sql variable?
...that is returned, you can do the same for all other kinds (didn't check if table possible, but I think yes.) I just tried it for nvarchar(50).
– Mzn
May 18 '14 at 4:39
2
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SQL Server: SELECT only the rows with MAX(DATE)
I have a table of data (the db is MSSQL):
11 Answers
11
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MySQL INNER JOIN select only one row from second table
I have a users table and a payments table, for each user, those of which have payments, may have multiple associated payments in the payments table. I would like to select all users who have payments, but only select their latest payment. I'm trying this SQL but i've never tried nested SQL sta...
SQL Server insert if not exists best practice
I have a Competitions results table which holds team member's names and their ranking on one hand.
8 Answers
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How to re-create database for Entity Framework?
... new project and create a new mdf. The mdf does not have to match your old tables, because were going to delete it. So create or copy an old one to the correct folder.
Open it in server explorer [double click the mdf from solution explorer]
Delete it in server explorer
Delete it from solution explor...
Oracle SQL Developer multiple table views
In Oracle SQL Developer , one can list the data in a table using the Data tab when viewing a table. there where can add, delete, edit or just viewing records of table currently viewd
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