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

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2answers
51 views

change column type from string to numeric

so I have a table with 5.2 million records. 3 columns in this table are for salaries. Those column are currently stored as string and I'd like to change the data type to numeric (I understood while ...
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2answers
97 views

Setting for default column type

Is there a setting in SQLServer 2008 and newer for default data type of date-time columns, i.e. datetime or datetime2? Actually more like something that would tell SQLServer to use datetime2 instead ...
0
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2answers
102 views

SQL Server BigInt vs Decimal

I need to choose a data type for SQL Server( BigInt vs Decimal) on the basis of performance and querying (10 digit number)
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1answer
173 views

12 hour format time in SQL datatype

I can convert time datatype to 12 hour format using convert etc. But is there any option to save the time in 12 hour format in SQL tables using any settings or property or any other methods?
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1answer
19k views

Float datatype with 2 digits after decimal point

In SQL server float datatype does not display leading zeros after decimal point declare @num as float set @num=5.20 select @num will dispaly only 5.2 But i want it to display as 5.20 After a ...
0
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2answers
153 views

looping through a table type variable

I have a function that has one parameter of a table type, i want to loop through all the fields and return the column that has a null or empty value. CREATE OR REPLACE FUNCTION ...
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1answer
47 views

pg_restore warning column X has type unknown

I'm doing a dump from PostgreSQL 9.1 and restoring on PostgreSQL 9.4 and getting this warning pg_restore: WARNING: column "foobar" has type "unknown" DETAIL: Proceeding with relation creation ...
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2answers
93 views

Why is Oracle's number datatype so HUGE? and why do I seem to have no alternatives?

Oracle has a favorite numerical class called NUMBER. It is a 22 byte value that just seems ludicrous in an index. I have some values that would easily fit in a 6 byte integer and would therefore fit ...
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1answer
44 views

What kind of data type to use for numbering in the Harmonized System?

The harmonized system uses a numbering that shows the hierarchy between different items. Similar to bookkeeping ledger numbers. Here is an example: 01 LIVE ANIMALS 0103 swine, live 010310 Purebred ...
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votes
5answers
460 views

define rating column in table?

Hi I am creating database for rating the items in my list but I want to ask what this if I have five stars rating how can I do it in database "rating" column should I use Int with check constraint or ...
0
votes
1answer
591 views

Why does Oracle store time in DATE column?

I have a table with a date column. I used JDBC to save a java.util.Date object into the table. When I run following query I get date aswell as a time value: select To_CHAR(departure_date,'DD-MM-YYYY ...
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votes
4answers
769 views

Writing SQL statement in sqlcmd to hide the milliseconds for column type of time

I have a table called testtable that have a column named expire_time of type [time] The problem is that when I type the following in sqlcmd: select * from testtable It will return the following: ...
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2answers
6k views

work with json in oracle

Is there an easy way to work with JSON within Oracle? I have a stored procedure that I use to call web services quite often, JSON is a format that I am familiar with in web development context, but ...
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votes
1answer
177 views

Do I lose data if I change from INT to TINYINT

I have a database (Engine InnoDB) that was setup by someone else. I noticed that one column contains data between 1 and 107 at this moment, and it is highly unlikely to further increase much. As it ...
0
votes
1answer
55 views

In a banking organization, why would account balance be declared as varchar and not decimal?

I worked in two organizations where I found money related columns are defined as VARCHAR data type. I didn't get correct explanation from anyone. As the database team is totally isolated with our ...
0
votes
1answer
94 views

Best datatype to store betting odds? [closed]

I have a lot of soccer betting odds (hundreds per match and thousands of matches), for example: <_10Bet_Home_Home>8.00</_10Bet_Home_Home> ...
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votes
1answer
128 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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votes
1answer
201 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 ...
0
votes
1answer
203 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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votes
1answer
1k 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 ...
0
votes
2answers
299 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 ...
0
votes
1answer
741 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 ...
0
votes
1answer
47 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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votes
1answer
496 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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votes
0answers
64 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
81 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
93 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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votes
0answers
37 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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votes
0answers
100 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 ...
0
votes
0answers
809 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 ...
0
votes
1answer
129 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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votes
0answers
347 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 ...
0
votes
1answer
847 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 ...
0
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1answer
2k 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
378 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
597 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
votes
1answer
5k 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 ...
-4
votes
1answer
99 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 ...