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Changing the maximum length of a varchar column?
...to use to do this. I found the documentation here: ALTER TABLE (Transfact-SQL) however I can't make heads or tails of it.
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Auto Generate Database Diagram MySQL [closed]
...ect specific tables and then create a database diagram for me based on a MySQL database? Preferably it would allow me to edit the diagram afterward since none of the foreign keys are set...
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How do you join on the same table, twice, in mysql?
... and alias them as the ToURL and FromUrl.
For more info about aliasing in SQL, read here.
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Alter Table Add Column Syntax
... To clarify, the 'COLUMN' keyword is only valid (but not required) in MySQL.
– ethanbustad
Feb 12 '15 at 21:28
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How to design a product table for many kinds of product where each product has many parameters
...gardless you have a blob of attributes that can't be easily queried within SQL; you have to fetch the whole blob back to the application and sort it out there.
Entity-Attribute-Value: One table for Products, and one table that pivots attributes to rows, instead of columns. EAV is not a valid design...
LINQ - Full Outer Join
...rJoin);
This works as written since it is in LINQ to Objects. If LINQ to SQL or other, the query processor might not support safe navigation or other operations. You'd have to use the conditional operator to conditionally get the values.
i.e.,
var leftOuterJoin =
from first in firstNames
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Insert Update trigger how to determine if insert or update
...L attempt, but the DELETED and INSERTED tables are empty. This is because SQL still accounts for times when you want to log each DML attempt (even when they do not alter any data).
– MikeTeeVee
Jan 24 at 15:04
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Hibernate: hbm2ddl.auto=update in production?
...so much of a hiccup with hibernate. We are a small team and are all mostly SQL RDBS beginners and have better faith in Hibernate handling schema than we do ourselves. I wonder what the error rate is for having a DBA on staff managing migrations and schema changes? Is it better than 0 in ~16K deploys...
How do I use an INSERT statement's OUTPUT clause to get the identity value?
...#, when you need to get the ID back to your calling app - just execute the SQL query with .ExecuteScalar() (instead of .ExecuteNonQuery()) to read the resulting ID back.
Or if you need to capture the newly inserted ID inside T-SQL (e.g. for later further processing), you need to create a table vari...
Return number of rows affected by UPDATE statements
... get the number of rows affected by an UPDATE query in a Stored Procedure (SQL Server 2005), as a resultset. e.g.
3 Answers...