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| − | + | |'''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. | |
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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. |
