Difference between revisions of "PHP-and-MySQL/C3/MySQL-Part-3/English-timed"

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{| border=1
 
{| border=1
−
!Time
+
|'''Time'''
−
!Narration
+
|'''Narration'''
 +
|- 
 +
|00:00
 +
|Hi, welcome back. In this tutorial you will write some data into a database.
 
|-
 
|-
−
|0:00
+
|00:07
−
|Hi, welcome back. In this tutorial we will write some data into a database.
+
|To do this we will use "mysql query" function.
 
|-
 
|-
−
|0:06
+
|00:12
−
|To do this we will use our "mysql query" function.
+
|Now you can see here that we have our... '''records'''.  
 
|-
 
|-
−
|0:10
+
|00:16
−
|Now you can see here that we have our... records....
+
−
|-
+
−
|0:16
+
 
|I am redoing this tutorial because the first time I did it, it did not work.  
 
|I am redoing this tutorial because the first time I did it, it did not work.  
 
|-
 
|-
−
|0:21
+
|00:22
 
|So first of all, I will just delete this data here.
 
|So first of all, I will just delete this data here.
 
|-
 
|-
−
|0:29
+
|00:29
 
|Well... ok... So we have a blank table, we have no data in our table whatsoever at the moment.
 
|Well... ok... So we have a blank table, we have no data in our table whatsoever at the moment.
 
|-
 
|-
−
|0:36
+
|00:37
 
|we can see that there is nothing in here.
 
|we can see that there is nothing in here.
 
|-
 
|-
−
|0:40
+
|00:40
−
|These are just our field names here.
+
|There are just our '''field''' names here.
 
|-
 
|-
−
|0:43
+
|00:43
−
|To begin with, in here, lets just comment this.
+
|To begin with, in here, let's just comment this.
 
|-
 
|-
−
|0:47
+
|00:47
−
|So "write some data". Then we will set up a query that will write data.
+
|So, "write some data". Then we will set up a '''query''' that will write data.
 
|-
 
|-
−
|0:52
+
|00:52
−
|So... "write" and we will use "mysql query" function.
+
|So... "$write" and we will use "mysql-query()" function.
 
|-
 
|-
−
|0:59
+
|00:57
−
|And this takes exactly 1 parameter which is our sql query.
+
|And this takes exactly 1 parameter which is our '''sql query'''.
 
|-
 
|-
−
|1:01
+
|01:02
 
|To do this, we will type "INSERT" to insert data.
 
|To do this, we will type "INSERT" to insert data.
 
|-
 
|-
−
|1:06
+
|01:06
 
|We are going to say "INSERT INTO".
 
|We are going to say "INSERT INTO".
 
|-
 
|-
−
|1:09
+
|01:09
−
|Now the reason I've typed this in capitals is because its sql code.
+
|Now the reason I've typed this in capitals is because it's '''sql code'''.
 
|-
 
|-
−
|1:14
+
|01:14
−
|If I type anything in uppercase it means it is sql code.
+
|If I type anything in uppercase it means it is '''sql code'''.
 
|-
 
|-
−
|1:19
+
|01:19
 
|If I type anything in lowercase it means its either a table name, database name or it is data that I'm writing to the database.
 
|If I type anything in lowercase it means its either a table name, database name or it is data that I'm writing to the database.
 
|-  
 
|-  
−
|1:30
+
|01:28
−
|So "INSERT INTO people" because that is our table name here.
+
|So, "INSERT INTO people" because that is our table name here.
 
|-
 
|-
−
|1:34
+
|01:33
 
| "INSERT INTO people" and then "VALUES" and then in brackets we will create a little area  for each value.
 
| "INSERT INTO people" and then "VALUES" and then in brackets we will create a little area  for each value.
 
|-
 
|-
−
|1:40
+
|01:42
−
|So we got 1,2,3,4,5.
+
|So, we got 1,2,3,4,5.
 
|-
 
|-
−
|1:46
+
|01:46  
−
|There are 5 fields so we need exactly 5 pieces of database written here.
+
|There are 5 '''fields''', so we need exactly 5 pieces of database written here.
 
|-
 
|-
−
|1:50
+
|01:53
 
|We need the id, firstname, lastname, all the way down to gender.
 
|We need the id, firstname, lastname, all the way down to gender.
 
|-
 
|-
−
|1:55
+
|01:58
−
|These are created in or created using single quotes each separated by comas.
+
|These are created in or created using single quotes each separated by coma.
 
|-  
 
|-  
−
|2:03
+
|02:07
 
|The reason we don't use double quotes is because we've got these at the end or rather start and end over here.
 
|The reason we don't use double quotes is because we've got these at the end or rather start and end over here.
 
|-
 
|-
−
|2:10
+
|02:15
−
|We don't need to insert our id  here.
+
|We don't need to insert our '''id''' here.
 
|-
 
|-
−
|2:13
+
|02:18
 
|Our next one is firstname - so I'll say "Alex".
 
|Our next one is firstname - so I'll say "Alex".
 
|-
 
|-
−
|2:17
+
|02:22
 
|My lastname I'll say is "Garrett".
 
|My lastname I'll say is "Garrett".
 
|-
 
|-
−
|2:20
+
|02:25
−
|For my date of birth I'll create a date function which equals to a variable "date"
+
|For my date of birth, I'll create a date function which equals to a variable "$date"
 
|-
 
|-
−
|2:26
+
|02:31
 
|I'll put this in the particular structure.
 
|I'll put this in the particular structure.
 
|-
 
|-
−
|2:28
+
|02:35
 
|We can see from our database over here that when we go to insert a value, we can scroll down and see that our calender function has dates on it.
 
|We can see from our database over here that when we go to insert a value, we can scroll down and see that our calender function has dates on it.
 
|-
 
|-
−
|2:39
+
|02:44
−
|So on clicking 23rd, we can see the structure this field takes.
+
|So, on clicking 23rd, we can see the structure this field takes.
 
|-  
 
|-  
−
|2:45
+
|02:50
−
|Its the year in long format.
+
|It's the year in long format.
 
|-
 
|-
−
|2:47
+
|02:52
 
|Next is the month and then the day.
 
|Next is the month and then the day.
 
|-
 
|-
−
|2:48
+
|02:55
 
|So 2009 02 23 which is 23rd of the 2nd, 2009.
 
|So 2009 02 23 which is 23rd of the 2nd, 2009.
 
|-
 
|-
−
|2:54
+
|03:02
−
|So what we can do here is we can structure our date function in capital Y  m and then d using hyphen in between to get the structure we need.
+
|So, what we can do here is, we can structure our '''date''' function in capital 'Y', 'm' and then 'd' using hyphen in between to get the structure we need.
 
|-
 
|-
−
|3:05
+
|03:13
−
|So this will be structured like that.
+
|So, this will be structured like that.
 
|-  
 
|-  
−
|3:09
+
|03:16
 
|This will equal to this and that will be the current date.
 
|This will equal to this and that will be the current date.
 
|-
 
|-
−
|3:13
+
|03:20
−
|Using the date and presuming that is in the structure of our date, we can insert it into our table here.
+
|Using the '''$date''' and presuming that is in the structure of our date, we can insert it into our table here.
 
|-
 
|-
−
|3:24
+
|03:28
−
|The last one is gender and since I'm a male, I'm putting in "M" for male.
+
|The last one is '''gender''' and since I'm a male, I'm putting in "M" for male.
 
|-
 
|-
−
|3:28
+
|03:34
−
|Presuming that will work, we can run this.
+
|Presuming that will work, we can '''run''' this.
 
|-
 
|-
−
|3:30
+
|03:37
−
|But before that, we could say "or die" at the end followed by a mysql error.
+
|But before that, we could say '''or die''' at the end followed by "mysql_error".
 
|-
 
|-
−
|3:38
+
|03:44
 
|I will skip that for now but feel free to add them if you like.
 
|I will skip that for now but feel free to add them if you like.
 
|-
 
|-
−
|3:44
+
|03:50
−
|Ok so refreshing our page.  
+
|Ok, so refreshing our page.  
 
|-
 
|-
−
|3:48
+
|03:53
 
|What you see is from the last tutorial.  
 
|What you see is from the last tutorial.  
 
|-  
 
|-  
−
|3:50
+
|03:57
−
|ummmm..... Lets comment this out.
+
|ummmm..... Let's comment this out.
 
|-
 
|-
−
|3:56
+
|03:59
−
|Lets ignore this.
+
|Let's ignore this.
 
|-
 
|-
−
|3:57
+
|04:01
 
|This will completely ignore this part of tutorial.
 
|This will completely ignore this part of tutorial.
 
|-
 
|-
−
|4:02
+
|04:08
−
|Ok - so back to the code that I am currently showing and lets refresh.
+
|Ok - so back to the code that I am currently showing and let's '''refresh'''.
 
|-
 
|-
−
|4:10
+
|04:14
−
| I've refreshed it twice so accordingly 2 records have been put in.
+
| I've refreshed it twice. So, accordingly 2 '''records''' have been put in.
 
|-
 
|-
−
|4:14
+
|04:24
−
|But by going back to browse and scrolling down we can see, lets delete 1 of these, we can see the data I just specified has been put into the database.
+
|But by going back to browse and scrolling down we can see, let's delete 1 of these, we can see the data 1 just specified, has been put into the database.
 
|-
 
|-
−
|4:26
+
|04:35
−
|In fact what I have done is I have put my date of birth as the current date which I didn't mean to do.
+
|In fact, what I have done is I have put my date of birth as the current date which I didn't mean to do.
 
|-
 
|-
−
|4:33
+
|04:43
 
|I don't want my date of birth as the current date because I was not born today.
 
|I don't want my date of birth as the current date because I was not born today.
 
|-
 
|-
−
|4:39
+
|04:48
−
|My firstname is ok.  My lastname is ok.  My gender is fine.
+
|My '''firstname''' is ok.  My '''lastname''' is ok.  My '''gender''' is fine.
 
|-
 
|-
−
|4:43
+
|04:53
−
|We can see that my id is 6 at the moment and the next time we insert a record this would go up to 7 and then again to 8.
+
|We can see that my '''id''' is 6 at the moment and the next time we insert a record this would go up to 7 and then again to 8.
 
|-  
 
|-  
−
|4:53
+
|05:02
−
|You should know that by now.
+
|You should know that by now.Next what I'll show you is how to change my date of birth because I have made a mistake.
−
|-
+
−
|4:54
+
−
|Next what I'll show you is how to change my date of birth because I have made a mistake.
+
 
|-
 
|-
−
|5:00
+
|05:09
−
|So first I will comment these 2 lines so we don't have to rerun this.
+
|So, first I will '''comment''' these 2 lines so we don't have to re-run this.
 
|-
 
|-
−
|5:04
+
|05:15
 
|And I'll create a new variable.  We will just comment this as "update data".
 
|And I'll create a new variable.  We will just comment this as "update data".
 
|-
 
|-
−
|5:08
+
|05:20
−
|Current variable called "update" and that's equal to "mysql query" function.
+
|Current variable called "$update" and that's equal to "mysql_query()" function.
 
|-
 
|-
−
|5:14
+
|05:26
−
|And inside the parameter that we are calling is "mysql query" code itself.
+
|And inside the '''parameter''' that we are calling is '''mysql query code''' itself.
 
|-
 
|-
−
|5:20
+
|05:32
−
|So here we will type "UPDATE" and we are going to say the table name which is "people".
+
|And here you  will type "UPDATE" and we are going to say the table name which is "people".
 
|-
 
|-
−
|5:28
+
|05:38
−
|Then we will say "SET" and we need to pick a particular field in which to set.
+
|Then we will say "SET" and we need to pick a particular '''field''' in which to set.
 
|-
 
|-
−
|5:34
+
|05:43
 
|This happens to be the "d o b" and that's equal to my actual date of birth which is 1989, the year I was born in and the month is November and the day I was born is 16th.
 
|This happens to be the "d o b" and that's equal to my actual date of birth which is 1989, the year I was born in and the month is November and the day I was born is 16th.
 
|-
 
|-
−
|5:47
+
|05:57
−
|By running this command what we are actually doing is we are updating everyone's date of birth in this table to this.
+
|By running this '''command''' what we are actually doing is we are updating everyone's date of birth in this table to this.
 
|-  
 
|-  
−
|5:54
+
|06:05
 
|That's because we've not specified where we want to update this.
 
|That's because we've not specified where we want to update this.
 
|-
 
|-
−
|5:57
+
|06:10
 
|But we can do is after this we can say "WHERE id=6" because my unique id is 6.
 
|But we can do is after this we can say "WHERE id=6" because my unique id is 6.
 
|-
 
|-
−
|6:08
+
|06:18
−
|Lets have a look here.
+
|Let's have a look here.
 
|-
 
|-
−
|6:10
+
|06:23
 
|Otherwise it will update everyone else's.
 
|Otherwise it will update everyone else's.
 
|-
 
|-
−
|6:12
+
|06:26
−
|Remember I said the id is unique. Its better to say update my id.  
+
|Remember I said the '''id''' is unique. It's better to say update my '''id'''.  
 
|-
 
|-
−
|6:16
+
|06:32
−
|What I could do instead, is say, "WHERE firstname equals Alex".  However this will update every record that has firstname "Alex".
+
|What I could do instead is, say, "WHERE firstname equals 'Alex' ".  However this will update every '''record''' that has '''firstname''' "Alex".
 
|-
 
|-
−
|6:24
+
|06:41
 
|But we can also say "AND lastname equals Garrett".
 
|But we can also say "AND lastname equals Garrett".
 
|-
 
|-
−
|6:26
+
|06:46 
−
|However if we still have two people in the database with the same firstname and lastname, we are still running the same risk as before.
+
|However, if we will have two people in the database with the same firstname and lastname, we are still running the same risk as before.
 
|-
 
|-
−
|6:43
+
|06:54
−
|So its best to use our "unique" and thats the key word "unique id" which for me is 6.
+
|So, it's better to use our "unique" and that's the key word "unique id" which for me is 6.
 
|-
 
|-
−
|6:48
+
|07:00
 
|So at the moment, you can see that my date of birth is set to 2009 which is the current date.
 
|So at the moment, you can see that my date of birth is set to 2009 which is the current date.
 
|-
 
|-
−
|6:53
+
|07:06
−
|But by refreshing this page, nothing's happened because we are just running a command.
+
|But, by refreshing this page nothing's happened because we are just running a '''command'''.
 
|-
 
|-
−
|7:00
+
|07:11
−
|Now if we click on browse to refresh and we scroll down, we can see that it has changed to what we specified and everything else has been left intact.
+
|Now, if we click on '''Browse''' to '''refresh''' and we scroll down, we can see that it has changed to what we specified and everything else has been left intact.
 
|-
 
|-
−
|7:08
+
|07:21
−
|So if you need to update data in your database or anything like that, you can specify what data you want to update.
+
|So, if you need to update data in your database or anything like that, you can specify what data you want to update.
 
|-
 
|-
−
|7:15
+
|07:29
 
|I used "dob" and that equals to the date of birth that was necessary.
 
|I used "dob" and that equals to the date of birth that was necessary.
 
|-  
 
|-  
−
|7:18
+
|07:34
−
|I could have updated my lastname.
+
|I could have updated my '''lastname'''.
 
|-
 
|-
−
|7:20
+
|07:36
 
|You also need to specify where you want this to be updated.
 
|You also need to specify where you want this to be updated.
 
|-
 
|-
−
|7:24
+
|07:40
−
|So I said this record which is this long line here.
+
|So, I said this '''record''' which is this long line here.
 
|-
 
|-
−
|7:28
+
|07:46
−
|These are called records and I specified "WHERE" the id was equal to 6 and that has updated my unique record.
+
|These are called '''records''' and I specified "WHERE" the '''id''' was equal to 6 and that has updated my unique record.
 
|-
 
|-
−
|7:35
+
|07:56
 
|So that's what you have learnt - how to insert values and also how to update some values if you get it wrong like I did or if you just want to update some data which happens most of the time when your doing your databases.
 
|So that's what you have learnt - how to insert values and also how to update some values if you get it wrong like I did or if you just want to update some data which happens most of the time when your doing your databases.
 
|-
 
|-
−
|7:54
+
|08:10
 
|Ok - so join me in the next part to find out how to start reading from your database and display the data to the user.
 
|Ok - so join me in the next part to find out how to start reading from your database and display the data to the user.
 
|-
 
|-
−
|8:04
+
|08:17
−
|See you soon.  This is Juanita Jayakar dubbing for the Spoken Tutorial Project.
+
|See you soon.  This is Juanita Jayakar, dubbing for the Spoken Tutorial Project.

Latest revision as of 16:19, 24 March 2017

Time Narration
00:00 Hi, welcome back. In this tutorial you will write some data into a database.
00:07 To do this we will use "mysql query" function.
00:12 Now you can see here that we have our... records.
00:16 I am redoing this tutorial because the first time I did it, it did not work.
00:22 So first of all, I will just delete this data here.
00:29 Well... ok... So we have a blank table, we have no data in our table whatsoever at the moment.
00:37 we can see that there is nothing in here.
00:40 There are just our field names here.
00:43 To begin with, in here, let's just comment this.
00:47 So, "write some data". Then we will set up a query that will write data.
00:52 So... "$write" and we will use "mysql-query()" function.
00:57 And this takes exactly 1 parameter which is our sql query.
01:02 To do this, we will type "INSERT" to insert data.
01:06 We are going to say "INSERT INTO".
01:09 Now the reason I've typed this in capitals is because it's sql code.
01:14 If I type anything in uppercase it means it is sql code.
01:19 If I type anything in lowercase it means its either a table name, database name or it is data that I'm writing to the database.
01:28 So, "INSERT INTO people" because that is our table name here.
01:33 "INSERT INTO people" and then "VALUES" and then in brackets we will create a little area for each value.
01:42 So, we got 1,2,3,4,5.
01:46 There are 5 fields, so we need exactly 5 pieces of database written here.
01:53 We need the id, firstname, lastname, all the way down to gender.
01:58 These are created in or created using single quotes each separated by coma.
02:07 The reason we don't use double quotes is because we've got these at the end or rather start and end over here.
02:15 We don't need to insert our id here.
02:18 Our next one is firstname - so I'll say "Alex".
02:22 My lastname I'll say is "Garrett".
02:25 For my date of birth, I'll create a date function which equals to a variable "$date"
02:31 I'll put this in the particular structure.
02:35 We can see from our database over here that when we go to insert a value, we can scroll down and see that our calender function has dates on it.
02:44 So, on clicking 23rd, we can see the structure this field takes.
02:50 It's the year in long format.
02:52 Next is the month and then the day.
02:55 So 2009 02 23 which is 23rd of the 2nd, 2009.
03:02 So, what we can do here is, we can structure our date function in capital 'Y', 'm' and then 'd' using hyphen in between to get the structure we need.
03:13 So, this will be structured like that.
03:16 This will equal to this and that will be the current date.
03:20 Using the $date and presuming that is in the structure of our date, we can insert it into our table here.
03:28 The last one is gender and since I'm a male, I'm putting in "M" for male.
03:34 Presuming that will work, we can run this.
03:37 But before that, we could say or die at the end followed by "mysql_error".
03:44 I will skip that for now but feel free to add them if you like.
03:50 Ok, so refreshing our page.
03:53 What you see is from the last tutorial.
03:57 ummmm..... Let's comment this out.
03:59 Let's ignore this.
04:01 This will completely ignore this part of tutorial.
04:08 Ok - so back to the code that I am currently showing and let's refresh.
04:14 I've refreshed it twice. So, accordingly 2 records have been put in.
04:24 But by going back to browse and scrolling down we can see, let's delete 1 of these, we can see the data 1 just specified, has been put into the database.
04:35 In fact, what I have done is I have put my date of birth as the current date which I didn't mean to do.
04:43 I don't want my date of birth as the current date because I was not born today.
04:48 My firstname is ok. My lastname is ok. My gender is fine.
04:53 We can see that my id is 6 at the moment and the next time we insert a record this would go up to 7 and then again to 8.
05:02 You should know that by now.Next what I'll show you is how to change my date of birth because I have made a mistake.
05:09 So, first I will comment these 2 lines so we don't have to re-run this.
05:15 And I'll create a new variable. We will just comment this as "update data".
05:20 Current variable called "$update" and that's equal to "mysql_query()" function.
05:26 And inside the parameter that we are calling is mysql query code itself.
05:32 And here you will type "UPDATE" and we are going to say the table name which is "people".
05:38 Then we will say "SET" and we need to pick a particular field in which to set.
05:43 This happens to be the "d o b" and that's equal to my actual date of birth which is 1989, the year I was born in and the month is November and the day I was born is 16th.
05:57 By running this command what we are actually doing is we are updating everyone's date of birth in this table to this.
06:05 That's because we've not specified where we want to update this.
06:10 But we can do is after this we can say "WHERE id=6" because my unique id is 6.
06:18 Let's have a look here.
06:23 Otherwise it will update everyone else's.
06:26 Remember I said the id is unique. It's better to say update my id.
06:32 What I could do instead is, say, "WHERE firstname equals 'Alex' ". However this will update every record that has firstname "Alex".
06:41 But we can also say "AND lastname equals Garrett".
06:46 However, if we will have two people in the database with the same firstname and lastname, we are still running the same risk as before.
06:54 So, it's better to use our "unique" and that's the key word "unique id" which for me is 6.
07:00 So at the moment, you can see that my date of birth is set to 2009 which is the current date.
07:06 But, by refreshing this page nothing's happened because we are just running a command.
07:11 Now, if we click on Browse to refresh and we scroll down, we can see that it has changed to what we specified and everything else has been left intact.
07:21 So, if you need to update data in your database or anything like that, you can specify what data you want to update.
07:29 I used "dob" and that equals to the date of birth that was necessary.
07:34 I could have updated my lastname.
07:36 You also need to specify where you want this to be updated.
07:40 So, I said this record which is this long line here.
07:46 These are called records and I specified "WHERE" the id was equal to 6 and that has updated my unique record.
07:56 So that's what you have learnt - how to insert values and also how to update some values if you get it wrong like I did or if you just want to update some data which happens most of the time when your doing your databases.
08:10 Ok - so join me in the next part to find out how to start reading from your database and display the data to the user.
08:17 See you soon. This is Juanita Jayakar, dubbing for the Spoken Tutorial Project.

Contributors and Content Editors

Krupali, PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha

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