Specifies the type of data being stored (string, date, numeric, etc).

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1answer
105 views

Why does mysql give different result for this summations? [duplicate]

Can someone help understand the following behavior? mysql> select (1/3 + 1/3 + 1/3); +-------------------+ | (1/3 + 1/3 + 1/3) | +-------------------+ | 1.0000 | +-------------------+ ...
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1answer
175 views

Inheritance discriminator column better int or varchar or enum?

What is the best practice for storing a discriminator column ? Does it make any difference ? Any pros/cons of using one over the other ? I am using MySql with Entity Framework but the question goes ...
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1answer
148 views

Initializing values to a custom data type

I have defined a custom data type which I need to use in my procedure. Give below is my data type. CREATE or REPLACE TYPE CUSTOM_DATATYPE AS object( chkinvpre VARCHAR2(100), orderid ...
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1answer
923 views

Oracle - how to reference to a field%TYPE using database links?

I have this database which includes a couple of schemas. Say I need to access schemaONE from schemaTWO. To do this, I have created a database link named "DB_ONE_LINK". I am able to access to ...
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2answers
260 views

Should numeric identifiers like serial numbers be stored as integers?

Many of our databases store numeric tracking codes (like serial numbers) as integers. There is little chance of these codes every getting alphabetic characters, but it still seems like an incorrect ...
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1answer
708 views

timeout on updating nvarchar(max) after converting datatype

I recently Upgraded to 2008 Enterprise and took the opportunity to change the biggest table in my db with the maintenance window. ran the following to change my ntext field ALTER TABLE ...
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1answer
46 views

Does a numeric field always use the same disk space?

When you have a numeric field in MySQL(MYISAM) (E.g. Integer) will it always use the same disk space, no matter what number is actually stored?
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1answer
453 views

What are commonly used database types? [closed]

There are a lot of database types. Can you list a list of the top classification of databases commonly found in schools and offices? Any help is appreciated. Hope to see compressed and summarized type ...
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0answers
40 views

Decimal Data Type as Primary Key

One of my tables is set up like this: create table dbo.Source ( testID decimal (10,3) PRIMARY KEY , column 2 somedatatype , column 3 somedatatype ) Whenever I perform SSIS into this table ...
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2answers
59 views

Find and return items based on matching strings across 17 tables

I must start by saying that I am at best a sql novice. I am doing some data analysis and consolidation for my company and need to find if items match across any of the tables. The info in the tables ...
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0answers
45 views

How should I store image, text type files in mysql?

I came across some answers mentioning the "disasters" of storing files outside database and saving the path inside database. I've also noticed dozens of answers about storing images- which suggest to ...
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0answers
18 views

how to store binary (not blob)

I have a "collection" of boolean values that I need to store, in a database. It's a total of approx. 200 booleans that fit into ~13 groups. Each user that would be registered has his own set of ...
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0answers
78 views

Best data type to store Active Directory Nullable GUID

I have a table name Employees,inside Sql Server 2008 r2. the table contain the following columns:- UserID. it is the Primary key, and it is auto generated by the DB. GUID. which will store the ...
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1answer
100 views

MySQL 5.6 Datetime Range

According to MySQL 5.6 doc, the supported range for datetime data type is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. But when I tried inserting values that are earlier than '1000-01-01 00:00:00', ...
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0answers
466 views

Blob datatype issue with log file

I am getting continuously below error message in mysqld.log [ERROR] InnoDB: The total blob data length (10152274) is greater than 10% of the redo log file size (3072). Please increase ...
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1answer
96 views

How to use timestamp/rowversion data types in Visio?

I am using Visio 2010 to create a ER diagram. When I insert the column names, I can't find timestamp or rowversion data types. Is there an alternative?
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0answers
303 views

Suppressing the removal of trailing zeros in numeric data type in sql server

I initially declared the data type of the columns for some of the tables i am working on as "NUMERIC". cause of that, trailing zeros are being removed. Is there anyway to suppress this behavior? i ...
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1answer
773 views

Datetime Difference in MySQL when format is Varchar

I have two columns in a table: STOP and START, of type varchar. I want to have the difference between both columns, and I'm using : SELECT DATEDIFF(stop, start) AS difference from T1; It is ...
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1answer
1k views

What is the difference between int(8) and int(5) in mysql? [duplicate]

I found out, that if you have a field defined as INT(8) without ZEROFILL it will behave exactly as INT(5) in both cases the maximum value is −2,147,483,648 to 2,147,483,647, from −(2^31) to 2^31 − 1 ...
-1
votes
1answer
331 views

Recommended datatype fixed length in mysql

What's the best data type for store fix length data such as MD5 password 1f3870be274f6c49b3e31a0c6728957f HEX Ccolor f2a709 They don't need character sets. All in absolute [a-z0-9]{6} for color, ...
-1
votes
1answer
469 views

Multiple conditions in a derived column ssis

Hi I am trying fairly new to SSIS , and my task is to convert dates in string as given below to a datetime. These are my date of birth in the source file (string data type): Source date of birth ...
-2
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1answer
4k views

What are performance benefits when using number type instead of using char/varchar?

From various posts, I have summarized about using number type instead of char/varchar for PK: If you choose char/varchar type for PK and your values are short (just some alpha numberic codes) then it ...
-3
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1answer
74 views

How match a numeric column with a varchar parameter? [closed]

external_id in my source table is of varchar(255) data type I need to convert it to a numeric(20) to do a lookup on target table where card_id (contains external_id's) is of numeric(20) data type. I ...