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Random thoughts of Erik E, aka ESquared. Wednesday, January 16, 2013. On Conversion, Data Types, and Flawed Code. I came across the following expression recently:. DisplaySequence = Convert(int, IsNull(A.DisplaySequence, 10000). I was immediately struck by an inconsistency: the IsNull. Function is being passed an int. As its second parameter. That doesn't make sense. If the Convert. Is needed in the first place, then the DisplaySequence. Column is not int. Column will be converted to an int. Why does it ...

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Random thoughts of Erik E, aka ESquared. Wednesday, January 16, 2013. On Conversion, Data Types, and Flawed Code. I came across the following expression recently:. DisplaySequence = Convert(int, IsNull(A.DisplaySequence, 10000). I was immediately struck by an inconsistency: the IsNull. Function is being passed an int. As its second parameter. That doesn't make sense. If the Convert. Is needed in the first place, then the DisplaySequence. Column is not int. Column will be converted to an int. Why does it ...

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Squared Thoughts | squaredthoughts.blogspot.com Reviews

https://squaredthoughts.blogspot.com

Random thoughts of Erik E, aka ESquared. Wednesday, January 16, 2013. On Conversion, Data Types, and Flawed Code. I came across the following expression recently:. DisplaySequence = Convert(int, IsNull(A.DisplaySequence, 10000). I was immediately struck by an inconsistency: the IsNull. Function is being passed an int. As its second parameter. That doesn't make sense. If the Convert. Is needed in the first place, then the DisplaySequence. Column is not int. Column will be converted to an int. Why does it ...

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squaredthoughts.blogspot.com

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Squared Thoughts: April 2008

http://squaredthoughts.blogspot.com/2008_04_01_archive.html

Random thoughts of Erik E, aka ESquared. Friday, April 18, 2008. Welcome to Waste Land, the place where your server is full of. Columns. In case you're not familiar with those, the difference between the two sets of data types is that the ones that aren't varying (don't have the letters "var" in the data type name) always consume a fixed amount of space. So if you define a column in a table as char(2) and then insert the value 'a', the database actually stores 'a ' with an extra space. SET @Pos = 1.

2

Squared Thoughts: SQL Overelaboration

http://squaredthoughts.blogspot.com/2007/12/sql-confusion-december-2007.html

Random thoughts of Erik E, aka ESquared. Thursday, December 27, 2007. Random forum posting, function that detects if a string is made only of numbers:. CREATE function fn numeric. Input is varchar string. Returns bit - 0 = false, 1 = true. Declare @x smallint, @y smallint, @z bit. Set @string = replace(@string, ' ', '@'). Set @x = len(@string). Set @y = 0. Set @z = 1. Set @y = @y 1. If substring(@string, @y, 1) between '0' and '9'. Set @z = 0. WHERE ColumnToTest NOT LIKE '%[ 0-9]%'.

3

Squared Thoughts: The Excluded Possibility

http://squaredthoughts.blogspot.com/2013/01/the-excluded-possibility.html

Random thoughts of Erik E, aka ESquared. Monday, January 7, 2013. WHEN Value IS NULL AND Text IS NOT NULL THEN Text. WHEN Text IS NULL AND Value IS NOT NULL THEN Value. Does a problem leap out at you? It should. What if Value and Text are both not NULL. Then the whole expression is NULL. There's no WHEN Text IS NOT NULL AND Value IS NOT NULL THEN . It doesn't make sense. This can be rewritten much more sensibly:. Value = IsNull(Value, Text). Value = IsNull(Value, ' ) IsNull(Text, ' ).

4

Squared Thoughts: On Conversion, Data Types, and Flawed Code

http://squaredthoughts.blogspot.com/2013/01/on-conversion-data-types-and-flawed-code.html

Random thoughts of Erik E, aka ESquared. Wednesday, January 16, 2013. On Conversion, Data Types, and Flawed Code. I came across the following expression recently:. DisplaySequence = Convert(int, IsNull(A.DisplaySequence, 10000). I was immediately struck by an inconsistency: the IsNull. Function is being passed an int. As its second parameter. That doesn't make sense. If the Convert. Is needed in the first place, then the DisplaySequence. Column is not int. Column will be converted to an int. Why does it ...

5

Squared Thoughts: Some Pain Is Avoidable - So Spare Yourself

http://squaredthoughts.blogspot.com/2008/05/some-pain-is-avoidable-so-spare.html

Random thoughts of Erik E, aka ESquared. Wednesday, May 7, 2008. Some Pain Is Avoidable - So Spare Yourself. Ever heard of a runaway F5? This is when you intend to highlight only a small section of SQL code but you miss for some reason and when you hit F5, the entire script you have loaded runs instead of just the small part you tried to highlight. 1 Put this at the top:. This will make most of your code run in the wrong context. The GO statements are important as you need these to run without errors.

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Random thoughts of Erik E, aka ESquared. Wednesday, January 16, 2013. On Conversion, Data Types, and Flawed Code. I came across the following expression recently:. DisplaySequence = Convert(int, IsNull(A.DisplaySequence, 10000). I was immediately struck by an inconsistency: the IsNull. Function is being passed an int. As its second parameter. That doesn't make sense. If the Convert. Is needed in the first place, then the DisplaySequence. Column is not int. Column will be converted to an int. Why does it ...

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