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Can I use CASE statement in a JOIN condition?
The following image is a part of Microsoft SQL Server 2008 R2 System Views. From the image we can see that the relationship between sys.partitions and sys.allocation_units depends on the value of sys.allocation_units.type . So to join them together I would write something similar to this:
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The object 'DF__*' is dependent on column '*' - Changing int to double
...ield type.
The constraint is typically created automatically by the DBMS (SQL Server).
To see the constraint associated with the table, expand the table attributes in Object explorer, followed by the category Constraints as shown below:
You must remove the constraint before changing the field t...
How To Create Table with Identity Column
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Identity(seed,increment) docs.microsoft.com/en-us/sql/t-sql/statements/…
– Gratzy
Jul 31 '17 at 16:19
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MySQL INNER JOIN select only one row from second table
...s who have payments, but only select their latest payment. I'm trying this SQL but i've never tried nested SQL statements before so I want to know what i'm doing wrong. Appreciate the help
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String literals and escape characters in postgresql
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Note that on PostgreSQL 9.0 E'testing\\x20double-slash' will evaluate as 'testing\\x20double-slash', so only single-slash approach works for E'string' style literals
– Alexander
Aug 14 '12 at 14:02
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Large, persistent DataFrame in pandas
...ad chunks of the CSV files in a for-loop approach and add them e.g., to an SQLite database step by step:
import pandas as pd
import sqlite3
from pandas.io import sql
import subprocess
# In and output file paths
in_csv = '../data/my_large.csv'
out_sqlite = '../data/my.sqlite'
table_name = 'my_tabl...
Real life example, when to use OUTER / CROSS APPLY in SQL
... processing the whole table COULD be true it would surprise me (i know the sql optimizer/compiler can disappoint from time to time but this would be crazy behaviour)
– Lee Tickett
Feb 15 '12 at 9:51
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How can I copy data from one column to another in the same table?
...sible to copy data from column A to column B for all records in a table in SQL?
3 Answers
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On Duplicate Key Update same as insert
...ID; you need to specify the backend app you're using for the same.
For LuaSQL, a conn:getlastautoid() fetches the value.
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Transactions in .net
...n transactions and ambient transactions. A connection transaction (such as SqlTransaction) is tied directly to the db connection (such as SqlConnection), which means that you have to keep passing the connection around - OK in some cases, but doesn't allow "create/use/release" usage, and doesn't allo...