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How can I add a column that doesn't allow nulls in a Postgresql database?
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You have to set a default value.
ALTER TABLE mytable ADD COLUMN mycolumn character varying(50) NOT NULL DEFAULT 'foo';
... some work (set real values as you want)...
ALTER TABLE mytable ALTER COLUMN mycolumn DROP DEFAULT;
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Select rows which are not present in other table
I've got two postgresql tables:
4 Answers
4
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What's the difference between MyISAM and InnoDB? [duplicate]
...re, but most of the time it is asked in relation to a specific database or table. I cannot find an answer on this site that describes the two engines and their differences without respect to someones specific database.
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Proper REST response for empty table?
...nt to get list of users by calling GET to api/users , but currently the table was truncated so there are no users. What is the proper response for this scenario: 404 or 204 ?
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Pass Array Parameter in SqlCommand
...arameters[i], items[i]);
}
cmd.CommandText = string.Format("SELECT * from TableA WHERE Age IN ({0})", string.Join(", ", parameters));
cmd.Connection = new SqlConnection(connStr);
UPDATE: Here is an extended and reusable solution that uses Adam's answer along with his suggested edit. I improved it...
Rename column SQL Server 2008
I am using SQL Server 2008 and Navicat. I need to rename a column in a table using SQL.
11 Answers
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MYSQL Truncated incorrect DOUBLE value
...se I was not using apostrophes in where clause.
Like my query was
update table set coulmn1='something' where column2 in (00012121);
when I changed where clause to where column2 in ('00012121'); then the query worked fine for me.
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SQL DELETE with INNER JOIN
There are 2 tables, spawnlist and npc , and I need to delete data from spawnlsit .
npc_templateid = n.idTemplate is the only thing that "connect" the tables.
I have tried this script but it doesn't work.
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How can I remove duplicate rows?
... is the best way to remove duplicate rows from a fairly large SQL Server table (i.e. 300,000+ rows)?
38 Answers
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Are soft deletes a good idea? [duplicate]
...ow have to include a WHERE IsDeleted = false clause in every query on this table (and so much worse if you're JOINing these tables). A mistake here would be caught as soon as a user or tester noticed a deleted record showing up again, which might take some time. Also, it would be easy for a develo...