Database Management Exam > Database Management Videos > Microsoft SQL for Beginners > SQL Tutorial - 39: UPPER() and LOWER() Functions
SQL Tutorial - 39: UPPER() and LOWER() Functions Video Lecture | Microsoft SQL for Beginners - Database Management
FAQs on SQL Tutorial - 39: UPPER() and LOWER() Functions Video Lecture - Microsoft SQL for Beginners - Database Management
| 1. What is the purpose of the UPPER() function? |  |
Ans. The UPPER() function is used in SQL to convert all characters in a specified string to uppercase. This can be useful when you want to standardize the format of data or perform case-insensitive searches.
| 2. What is the purpose of the LOWER() function? | |
Ans. The LOWER() function is used in SQL to convert all characters in a specified string to lowercase. Similar to the UPPER() function, it can be used for standardizing data or performing case-insensitive searches.
| 3. How do you use the UPPER() function in a SQL query? | |
Ans. To use the UPPER() function, you simply need to provide the string or column you want to convert as an argument. For example, if you have a column called "name" and you want to convert all the names to uppercase, you can use the following query: SELECT UPPER(name) FROM table_name;
| 4. Can you combine the UPPER() and LOWER() functions in a single SQL query? | |
Ans. Yes, you can combine the UPPER() and LOWER() functions in a single SQL query. For example, if you have a column called "description" and you want to convert the first letter of each word to uppercase and the rest to lowercase, you can use the following query: SELECT CONCAT(UPPER(SUBSTRING(description, 1, 1)), LOWER(SUBSTRING(description, 2))) FROM table_name;
| 5. Are the UPPER() and LOWER() functions case-sensitive? | |
Ans. No, the UPPER() and LOWER() functions in SQL are not case-sensitive. They will convert all characters to uppercase or lowercase regardless of the original case. For example, if you use the UPPER() function on a string that is already in uppercase, it will remain the same. Similarly, if you use the LOWER() function on a string that is already in lowercase, it will also remain unchanged.
Text Transcript from Video
hello guys welcome to my channel this is
the 39th tutorial in this course and in
this tutorial we're going to check out
two more string functions and the first
one is the upper function and what this
function does is you pass to it a string
and it changes the case of all
characters in the string to uppercase
right so let me show you guys how this
function works type in select and then
the name of the function which is upper
and within parentheses I'll pass to it a
string argument or something like you
know hey there right and when I execute
I see that I get the string hey there
but I see all characters in uppercase
right so it has basically you know made
all characters capital letters and the
counterpart of this function is the
lower function and what that function
does is it changes the case of all
characters to lowercase right I mean it
changes only if the characters are not
already in lowercase like in this string
only one alphabet which is H the first
alphabet in the string that's an
uppercase stressed all the characters
already already in lowercase so it's not
going to do anything with them but you
know H is going to be turned into a
lowercase alphabet and I would execute
you would see that in the results that I
get hey they're the same string but I
see the first alphabet H in lowercase
right so let me just show you an
application of this these two functions
you know with a table that I have in the
database so I have got the tutorial
table and I'll just display the titles
of all tutorials in upper case first and
then in lower case so to see the type
the titles in upper case I'll have to
type in upper first and then within
parentheses I'll type in the name of the
field on which I want this function to
work and you know obviously when you're
using all these functions you know
concat or upper or lower or even the
ones that we're going to check out in
the you know next few tutorials the
string function the string functions
that we're going to check out those
functions have to be used on the
character fields that you have in your
table right so if you would use them
with the the numeric fields that you
have in your table then you would get
you know well you might
unexpected results so I'll type in this
and then the name of the table which is
tutorial and when I put in a semicolon
press the ctrl enter I get control in
Turkey I get all the tutorial titles in
uppercase right and if I would want to
see all of them in lowercase I just have
to replace upward by lower and press
ctrl enter again and this time I would
see all the tutorial titles in lowercase
right so that's what about these two
functions in the next video we're going
to check out you know more string
functions and thank you so much for
watching this one I'll see you in the
next one and you may subscribe to my
channel if you haven't already and take
care
the 39th tutorial in this course and in
this tutorial we're going to check out
two more string functions and the first
one is the upper function and what this
function does is you pass to it a string
and it changes the case of all
characters in the string to uppercase
right so let me show you guys how this
function works type in select and then
the name of the function which is upper
and within parentheses I'll pass to it a
string argument or something like you
know hey there right and when I execute
I see that I get the string hey there
but I see all characters in uppercase
right so it has basically you know made
all characters capital letters and the
counterpart of this function is the
lower function and what that function
does is it changes the case of all
characters to lowercase right I mean it
changes only if the characters are not
already in lowercase like in this string
only one alphabet which is H the first
alphabet in the string that's an
uppercase stressed all the characters
already already in lowercase so it's not
going to do anything with them but you
know H is going to be turned into a
lowercase alphabet and I would execute
you would see that in the results that I
get hey they're the same string but I
see the first alphabet H in lowercase
right so let me just show you an
application of this these two functions
you know with a table that I have in the
database so I have got the tutorial
table and I'll just display the titles
of all tutorials in upper case first and
then in lower case so to see the type
the titles in upper case I'll have to
type in upper first and then within
parentheses I'll type in the name of the
field on which I want this function to
work and you know obviously when you're
using all these functions you know
concat or upper or lower or even the
ones that we're going to check out in
the you know next few tutorials the
string function the string functions
that we're going to check out those
functions have to be used on the
character fields that you have in your
table right so if you would use them
with the the numeric fields that you
have in your table then you would get
you know well you might
unexpected results so I'll type in this
and then the name of the table which is
tutorial and when I put in a semicolon
press the ctrl enter I get control in
Turkey I get all the tutorial titles in
uppercase right and if I would want to
see all of them in lowercase I just have
to replace upward by lower and press
ctrl enter again and this time I would
see all the tutorial titles in lowercase
right so that's what about these two
functions in the next video we're going
to check out you know more string
functions and thank you so much for
watching this one I'll see you in the
next one and you may subscribe to my
channel if you haven't already and take
care
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Dec 27, 2024 Last updated |
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