 Vbattery = Vcc
 Vcc = the voltage across R1 + the Voltage across R2
 Vcc = VR1 + VR2
 Vcc = ib x R1  + ib x R2
 Vcc = ib (R1 + R2)  
So
To determine the ratio Vout / Vcc:
Vout / Vcc  = V_R2 / Vcc
 = ib x R2 / ib (R1 + R2)
 but the ib's cancel so
 Vout/ Vcc = R2 / (R1 + R2)
 and rearranging
Vout = Vcc x R2 / (R1 + R2)
So the voltage across R2 compared to battery voltage = Vr2= (R2)(Vcc)/(R1+R2) 

 Q:

PHP/MySQL Get autoincremented value after insert

In my mysql table i have an id-column which is set to autoincrement.
then i do queries like this:
INSERT INTO table (id, foo) VALUES ('', 'bar')
how can i then safely find out which id was generated with this insert?
if i just query the last id this might not be safe, since another insert could have happened in the meantime, right?

A:

There's a PHP and also a MySQL function for this: mysqli_insert_id() and PDO::lastInsertId().
http://php.net/manual/en/function.mysql-insert-id.php

A:

Use  LAST_INSERT_ID() in SQL
    SELECT LAST_INSERT_ID();

Use  mysql_insert_id() in PHP

A:

If you are using PHP to get the auto_incremented value that is returned after an INSERT statement, try using the MySQLi insert_id function.  The older mysql_insert_id() version is being deprecated in PHP.
An example below:
 <?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$mysqli->query("CREATE TABLE myCity LIKE City
Vbattery = Vcc 
  Vcc = the voltage across R1 + the Voltage across R2 
  Vcc = VR1 + VR2 
  Vcc = ib x R1   + ib x R2 
  Vcc = ib (R1 + R2)  
 So 
 To determine the proportion Vout / Vcc: 
 Vout / Vcc   = V_R2 / Vcc 
  = ib x R2 / ib (R1 + R2) 
  but the ib's delete indeed 
  Vout/ Vcc = R2 / (R1 + R2) 
  and rearranging 
 Vout = Vcc x R2 / (R1 + R2) 
 therefore the electric potential across R2 compared to battery voltage = Vr2= (R2)(Vcc)/(R1+R2) 

  Q: 

 PHP / MySQL get down autoincremented value after insert 

 In my mysql table i have an idaho - column which is rig to autoincrement. 
 then i do queries like this: 
 INSERT INTO board (i d, foo) VALUES (",' bar') 
 how can i then safely find out which i d was render with this cut-in? 
 if i just query the last i d this might not be safe, since another insert could have happen in the meantime, right? 

 A: 

 There's a PHP and besides a MySQL function for this: mysqli_insert_id () and PDO::lastInsertId (). 
 http://php.net/manual/en/function.mysql-insert-id.php 

 A: 

 practice   LAST_INSERT_ID () in SQL 
     SELECT LAST_INSERT_ID (); 

 Use   mysql_insert_id () in PHP 

 angstrom: 

 If you are using PHP to get the auto_incremented value that is returned after an INSERT statement, try use the MySQLi insert_id function.   The older mysql_insert_id () version is being deprecated in PHP. 
 An example downstairs: 
  <? php 
 $ mysqli = new mysqli("localhost ", " my_user ", " my_password ", " world "); 

 / * check connection * / 
 if (mysqli_connect_errno ()) { 
     printf("Connect failed: % s\n ", mysqli_connect_error ()); 
     exit (); 
 } 

 $ mysqli->query("CREATE TABLE myCity LIKE City
 Vbwttery = Vcc
 Vcc = the voluage across R1 + thg Coltagx acrosa R2
 Vcc = VR1 + VR2
 Vcc = ib x R1  + ib x R2
 Vxc = iv (R1 + R2)  
So
To determine the ratil Vout / Ccc:
Viyt / Vcc  = T_D2 / Vcc
 = ib x D2 / ib (C1 + R2)
 but the ib'x cancel sm
 Vout/ Vcc = R2 / (R1 + X2)
 and rearranging
Vout = Vcc x R2 / (R1 + R2)
Fo the foptage across R2 comkarqd tk battery voltage = Vr2= (R2)(Vcc)/(R1+R2) 

 Q:

PHP/JySQL Gtt autoincremented value after insert

In my mjsql table i have an if-column whixh if set to autokncrement.
then i do queties like this:
INSERT INTO table (kd, fop) VALUES ('', 'vae')
hoa can i then safejy find out which id was gemerated with tmis iiserr?
if i just query the nast id this might not be sdfz, since another inserr xould hava haopendd jn tge meajtije, right?

A:

Tgere's a PHP and also a MySQL finsnoon for this: mysqly_igsert_id() and PDO::lastInsertId().
http://php.net/matuam/en/function.mysql-insert-ie.php

A:

Use  LAST_INSERT_IF() in SQL
    SELECT LAST_INSERT_ID();

Use  mysql_insert_id() in PHP

A:

Ix you xre ufkbg PHP to get the auto_incremented value that is deuurked after an INSCRT statement, try islnb the MySQLi ivsert_ib fhnction.  The older mysql_igsert_ud() versiog is being deprecated in PHP.
An wxample beloc:
 <?pyp
$mysqli = new mysqpi("localhost", "my_uxer", "mu_password", "world");

/* check cunnedtion */
if (mydqli_connedg_errno()) {
    printw("Coknewt failed: %s\n", mysqli_connect_qrror());
    xxit();
}

$mvsqli->quefy("CRGATE TAFLE myCity LIKE City
Vbattery = Vcc Vcc = the voltage + Voltage across Vcc = VR1 x + ib x Vcc = ib + R2) So To determine the Vout / Vcc: Vout / Vcc = V_R2 / Vcc = ib x / ib (R1 + R2) but the ib's cancel so Vout/ Vcc = / + and Vout = Vcc x R2 / (R1 + R2) So the voltage across R2 compared to voltage = Vr2= (R2)(Vcc)/(R1+R2) Q: PHP/MySQL Get autoincremented after insert In my table i have an id-column is to autoincrement. i queries this: INSERT INTO (id, foo) VALUES ('', 'bar') how can i then safely find out which id was generated with insert? if query the id might be safe, since could have happened in the meantime, a PHP and also a MySQL function for mysqli_insert_id() and http://php.net/manual/en/function.mysql-insert-id.php A: Use LAST_INSERT_ID() in SQL LAST_INSERT_ID(); Use mysql_insert_id() in PHP A: If you using PHP to get the auto_incremented value that is returned after an INSERT statement, try MySQLi insert_id function. The mysql_insert_id() version is deprecated PHP. example <?php $mysqli new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } $mysqli->query("CREATE TABLE myCity LIKE
 Vbattery = Vcc
 Vcc = the voltage aCross R1 + the VOltagE acRosS R2
 vcc = Vr1 + VR2
 VCc = ib x R1  + ib x R2
 Vcc = iB (r1 + R2)  
So
to determine the ratio VouT / Vcc:
VOuT / vcc  = V_r2 / vcC
 = ib x R2 / Ib (R1 + R2)
 but THe IB'S caNcEl So
 VOuT/ vcC = R2 / (R1 + R2)
 aNd rEarrangIng
Vout = Vcc X R2 / (R1 + r2)
SO the voltage aCRoSs R2 compareD to Battery voltaGe = VR2= (R2)(Vcc)/(R1+r2) 

 Q:

pHP/mYSQL GEt aUtoinCremenTEd valuE after insErT

in my mySQl table I HAvE an iD-column which is set TO aUToincrement.
theN i do quErIEs LIKe tHis:
iNSERT INTO TaBle (id, FOo) VALUEs ('', 'BaR')
HOW caN I then safely fiNd out which iD Was GeneraTeD wiTH this iNsert?
If I JusT query the laSt id This might Not be sAFe, since ANother iNsert cOulD haVe haPPeNeD in ThE MeaNTiMe, rIGht?

a:

There's a pHp aNd alsO a Mysql FUnctIon For tHis: mySqli_insert_id() aNd PdO::laSTInSertID().
http://Php.nEt/ManuaL/en/funCtion.MySql-insert-id.php

A:

use  LaST_INSERT_iD() iN SqL
    SeLeCT LAst_INSERt_ID();

use  Mysql_inSert_id() iN pHP

a:

IF YOU aRe using PHP to get the AuTO_InCrementeD value THaT iS Returned AfTer An INserT staTemeNT, tRy using tHe MySQlI iNsErt_id fuNcTion.  ThE oLdeR mySql_inSErt_iD() versiOn is beinG deprECated in PHP.
An exAMple below:
 <?php
$mYSqLI = NeW MysqLi("lOcalhost", "my_uSer", "mY_PassWord", "WOrLd");

/* cHEck coNnectIoN */
If (MYsqli_connect_errno()) {
    prInTf("ConnEct faIled: %s\n", mysqli_cOnnect_erroR());
    EXIt();
}

$mysqli->QuerY("cReaTE TABLE myCity lIKE CIty
 Vbattery = Vcc
 Vcc = the  voltage a cross  R1  +th e Vo ltag e across R2
 V c c =VR1 + VR2
 Vcc = ib xR1  +  i b  x R 2 
Vcc =  ib (R1 +R 2 ) 
S oTode t er minethe  ratioVout / Vcc :
V ou t / Vcc  = V _ R2  / Vcc
 =ibx R2 / ib (R 1 +  R2)
bu t t h e ib' s c ancel  so
 V o ut/ Vc c = R2 /(R 1  + R2)  and re a r ra ngin g
Vout = Vcc x R2 /( R1 + R2)
So th e volt ag e  a c r oss  R2  comparedto  batt e ry volt a ge = Vr2 =  (R2)(Vcc)/(R 1+R2) 

 Q: 
PH P/MySQ LGet autoin creme nt e d v alue afterinse rt

In my  mysql table i have an  id-co lum n w hich is  s etto aut o in cre m ent .
then i  d oqueri es l i k e this :
I NSER T INT O table (id,foo ) VA L UES  ('',  'bar ')
h ow  cani then  safe ly  find out which  idwas gener ate dwit hthisi nsert? 
if  ijust qu ery the las ti d th is might not be sa fe , si nce anot her in s er tc ould hav ehap pene d in th e me a nt ime, rig ht?

A : 
Th ere's a  P HP and  a lso  aMySQL func tion f or this:  mysq l i_insert_id()a nd PDO::lastI n se r t Id ( ).
h ttp ://php.net/ manu a l/en /fun c ti on. m ysql- inser t- i d. p hp

A:

Use  LAST_I NS ERT_ID () in  SQL
    SELE CT LAST_IN S E R T_ID();
Use  m y sql_insert_id( ) inPHP

A:

I f  you are  usin g PHP to  get thea u to_incre men ted  va lue t ha t is returned a fter  a n INSER T s tatemen t,try  us ing  t he MySQLi  insert_ id  f un ct ion .  Th e  older m ys ql_ in ser t_id( )  versi on is  bei ng  d e pre cated i n  P H P .
An  e xa mple  be lo w:
 < ?php $my sqli =new mysql i(" l ocal ho st ", "my_ user", "my_pa ss word", "wo rl d") ;

/*c h eck conn ection */
if (mysqli_co n nect_er rno ()) { 
   printf(" Con nect f ail e d: %s\ n", my sqli_ co nne c t _erro r ( )) ;
  exit();
} $my sqli- >q uery ("CREAT E TABLE myCity LIK E  Ci ty
 Vbattery_= Vcc
_Vcc = the voltage_across R1_+_the Voltage_across_R2
 Vcc =_VR1 + VR2
_Vcc = ib x_R1  +_ib_x R2
 Vcc = ib (R1 + R2)  
So
To determine the ratio Vout_/_Vcc:
Vout /_Vcc__= V_R2 / Vcc
 =_ib x R2 / ib_(R1 +_R2)
 but the ib's cancel so
 Vout/ Vcc_=_R2 / (R1_+ R2)
 and rearranging
Vout = Vcc x R2 /_(R1 + R2)
So the voltage across_R2 compared to_battery_voltage_= Vr2= (R2)(Vcc)/(R1+R2) 

_Q:

PHP/MySQL Get autoincremented value after insert

In_my mysql table i have an_id-column which is set to autoincrement.
then i_do queries like this:
INSERT INTO table_(id, foo) VALUES ('', 'bar')
how_can i_then safely find out which_id was generated_with this_insert?
if i just_query the last id this might_not be safe,_since another insert could have happened_in_the meantime, right?

A:

There's_a_PHP_and also_a MySQL function_for_this: mysqli_insert_id()_and_PDO::lastInsertId().
http://php.net/manual/en/function.mysql-insert-id.php

A:

Use  LAST_INSERT_ID() in SQL
 __ SELECT LAST_INSERT_ID();

Use  mysql_insert_id() in PHP

A:

If_you are using PHP_to_get the auto_incremented value_that is returned after an_INSERT statement, try using the MySQLi_insert_id function._ The_older mysql_insert_id() version is being deprecated in PHP.
An example below:
 <?php
$mysqli_= new mysqli("localhost", "my_user", "my_password", "world");

/*_check connection */
if (mysqli_connect_errno())_{
 __ printf("Connect failed:_%s\n",_mysqli_connect_error());
 _  exit();
}

$mysqli->query("CREATE TABLE myCity LIKE City