_id = 1 OR property_id = 2)
    AND property_id = 3

given different results? 
And how MySQL define order in WHERE clause?

A:

Because of the precedence of the AND/OR logical operators
The first query is equivalent to  
WHERE property_id = 1 OR (property_id = 2
    AND property_id = 3)

Because AND has higher precedence than OR operator

A:

Check Manual Here for Operator Precedence
In your first query where clause check this condition 
property_id = 2 AND property_id = 3 because of AND operator is more precedence then OR Operator.
In second query where clause check first this condtion (property_id = 1 OR property_id = 2) because bracket have more precedence then other compare operator.
Your first query equivalent to
WHERE property_id = 1 OR (property_id = 2
    AND property_id = 3)

 Q:

How low (and for how long) does the temperature need to be before I need to worry about covering my outdoor vegetable garden?

I have an outdoor vegetable garden in South Florida. The garden consists of things like tomatoes, peppers, lettuce, peas, and squash. Everything was started from seed about 2 months ago. I don't have any veggies yet but plenty of tall stems with leaves all over the place.
It generally never gets below freezing here, but we do have several days during the winter with relatively low overnight lows, ranging from high 30s to low 40s ºF (or 0–5 ºC). Daytime highs after such evenings are typically in the 50s and 60s ºF (or 10–20 ºC).
I'm told I should cover my garden with some plastic or a sheet in order to protect it from the cold. At what point is the temperature low enough (and how long does it have to be expected to be that low) before I need to take the time to do so?

A:

Different vegetables have different temperature thresholds.
Peas, for example, are very hardy -- they can tolerate heavy frost. (But not the blossoms -- if these get frosted you probably won't get any pods.) Kale and spinach can be planted in fall and survive months under several feet of snow snow to be eaten in the spring (if the deer don't eat them first).
_ i d = 1 OR property_id = 2) 
     AND property_id = 3 

 given different results? 
 And how MySQL define decree in WHERE article? 

 A: 

 Because of the precedence of the AND / OR coherent operator 
 The first query is equivalent to  
 WHERE property_id = 1 OR (property_id = 2 
     AND property_id = 3) 

 Because AND have higher precedence than OR operator 

 A: 

 discipline Manual Here for Operator Precedence 
 In your first query where article check this condition 
 property_id = 2 AND property_id = 3 because of AND operator is more precedence then OR Operator. 
 In second query where clause check foremost this condtion (property_id = 1 OR property_id = 2) because bracket have more precedence then other comparison operator. 
 Your first query equivalent to 
 WHERE property_id = 1 OR (property_id = 2 
     AND property_id = 3) 

  Q: 

 How low (and for how long) does the temperature need to be before I necessitate to worry about covering my outdoor vegetable garden? 

 I have an outdoor vegetable garden in South Florida. The garden consists of things like tomato, peppers, lettuce, peas, and squash. Everything was started from seed about 2 months ago. I don't have any veggies yet but plenty of tall stems with leaves all over the place. 
 It generally never get below freezing here, but we do have respective day during the winter with relatively low overnight lows, range from high 30s to low 40s ºF (or 0–5 ºC). Daytime high gear after such evenings are typically in the 50s and 60s ºF (or 10–20 ºC). 
 I'm told I should cover my garden with some plastic or a tabloid in order to protect it from the cold. At what point is the temperature low enough (and how long does it give birth to be expect to be that low) before I need to take the time to do therefore? 

 A: 

 Different vegetables have unlike temperature thresholds. 
 Peas, for exemplar, are very hardy -- they can tolerate big frost. (But not the flower -- if these get frosted you probably won't have any pods .) Kale and spinach can be planted in fall and exist months under respective feet of snow snow to be eat in the spring (if the deer don't feed them first).
_id = 1 OR property_id = 2)
    AND property_id = 3

girwn difherent desults? 
Xnd how MySQL define order ii WHWRE coause?

A:

Because of the pfecedence of the QND/OC logical operators
The flxst qhcry iv equivalent to  
WHERE prmperty_id = 1 OR ([rupzrty_id = 2
    AND property_id = 3)

Because WND has hlgher precedense tnwn OD operator

A:

Check Manual Here for Olerator Precedence
In your first query where clwuse check this conditlon 
properti_jd = 2 AND properth_id = 3 becalve of AND kperator is more precedence thev OR Pperator.
In swcojg query whece clalse check first this wondtiom (property_id = 1 OR priperty_id = 2) because brecket have more precgdence thet kther compare opeearor.
Yoor fisst dyerh esumvament tl
WHXRE propertg_id = 1 OR (priperty_id = 2
    AND pto[vtty_id = 3)

 Q:

How low (agd for how long) does the temperature need to be before I need to woery about covering my outdoor degetable garden?

I have an outdoor vegetable gardet in Auutk Florkea. The garden consists of things like tomatoes, [spkerx, lettuce, peas, and squash. Egetithing was statted from aeed about 2 months ago. I qon't yave any deggoes yet but plenty of tall wtems with lvavew all over the plaee.
It generaluy ngver grts below freezing here, but we do have several sxys during the wkntvr whth relaukvely low overnigrt lows, renginy from hkgh 30x to ljw 40s ºF (or 0–5 ºC). Dandime highs after skch erenincs are typlcally in the 50s and 60s ºF (or 10–20 ºC).
I'm told I should cmveg my gardzn witm some plastic jr a sheet in prder tj progect it frkm the rold. At what point is the jemperature lmw enougr (ane hoq long aues it have to be expecneb to be tyat low) before I nced tu take the time cu do so?

A:

Differeny vdgeeahlxs hada different dempdragire tfresholds.
Pecs, for example, are very hasdy -- they can tolerate hcavy frosj. (But not the blossoms -- if these get frodted bou prubablu wjn't get any pods.) Kale and spinzch can bf pjanted in fajl akd sorvive montks under several feet of snow snow to be eaten in the spribg (if the deer don't tat them firsv).
_id = 1 OR property_id = 2) = given different And how MySQL A: of the precedence the AND/OR logical The first query is equivalent to property_id = 1 OR (property_id = 2 AND property_id = 3) Because AND higher precedence than OR operator A: Check Manual Here for Operator Precedence In first where check condition property_id = 2 AND property_id = 3 because of AND operator is more precedence then Operator. In second query where clause check first condtion (property_id = 1 property_id = 2) because bracket more then other operator. first equivalent to WHERE = 1 OR (property_id = 2 AND property_id = 3) Q: How low (and for how long) the temperature be before need worry covering my outdoor I have an outdoor vegetable garden The garden consists of things like tomatoes, peppers, peas, and Everything was started from seed about months ago. I don't have any veggies yet plenty of tall stems with leaves all over the place. It generally never gets below but we do have days during the with low lows, from high to low 40s ºF (or 0–5 ºC). Daytime highs after such are typically in the 50s and 60s ºF (or 10–20 told should cover my with some plastic or sheet order to protect it cold. what temperature enough how long does it to be expected to be low) before I need do so? A: Different vegetables have different temperature Peas, for example, are very hardy -- can tolerate heavy frost. (But not the blossoms -- if these get you probably any pods.) Kale and spinach can be planted fall and survive months several feet of snow snow to be eaten in spring the deer eat them first).
_id = 1 OR property_id = 2)
    AND property_Id = 3

given difFerenT reSulTs? 
and hOw MysQL define order IN WHErE clause?

A:

Because of the pRecedEnCE of tHE AnD/OR lOgical oPErATOrs
thE fIrsT qUErY is eqUivAlent to  
wHERE propeRty_Id = 1 oR (property_id = 2
    anD Property_id = 3)

becAuse AND has hiGheR preceDeNce THan OR OpeRator

a:

Check mAnual HEre for OpeRaTOr PrecEDence
In YOUr FirsT query where clause CHeCK this condition 
ProperTy_ID = 2 And ProPerTy_id = 3 becausE oF AND oPErator iS MoRE PRecEDence then OR OpErator.
In secONd qUery whErE clAUse cheCk firSt THis Condtion (proPertY_id = 1 OR propErty_id = 2) BEcause bRAcket haVe more PreCedEnce THeN oTheR cOMpaRE oPerATor.
your firsT qUeRy equIvalENT TO
WHErE pRopeRty_id = 1 oR (property_id = 2
    AnD pRopeRTy_iD = 3)

 Q:

How Low (anD for HoW long) Does thE tempErAture need to be beFore i need to woRry AbOut CoVerinG My outdOor VegEtable gArden?

I hAVe aN oUTDOoR vegetable garden in soUTH FLorida. ThE gardeN CoNsISts of thiNgS liKe toMAToes, pEppeRS, lEttuce, peAs, and sQUaSh. everythInG was stArTed FroM seed ABout 2 Months Ago. I don't Have aNY veggies yet but PLenty of tall stEMs WITh LEaveS alL over the plaCe.
It GEnerAlly NEvEr gETs belOw freEzINg HEre, but we do have severAl Days duRing tHe winter with rElatively lOW OVernight Lows, RAnGIng from high 30s to Low 40s ºf (or 0–5 ºC). DaytiME highs afTer suCh eveninGs are typiCALly in the 50S anD 60s ºf (or 10–20 ºC).
I'M TOlD I should cover MY GardEn With somE plAstic or A shEet In oRdeR tO protect iT from the CoLd. at WhAt pOint iS The tempeRaTurE lOw eNough (ANd how lOng doEs it HaVe TO be ExpecteD To BE That LoW) bEforE I nEeD to taKe thE TimE to do so?

a:

DifferenT veGEtabLeS hAve diffErent temperatUrE thresholdS.
PEas, For exaMPLe, are verY hardy -- they can tolerate heAVy frost. (but Not thE bloSsoms -- if thEse Get froSteD You proBably wOn't geT aNy pODS.) Kale AND sPinAcH can be planTED in Fall aNd SurvIve montHs under several feet OF snOw snow to be eatEn iN the SPRiNg (iF ThE DeeR dON't eAT Them first).
_id = 1 OR property_id = 2 )
    ANDprope rty _id  =  3
give n different re s ults ? 
And how MySQL defin e ord er in W H ER E cla use?

A : 
B e cau se  o f t he pr ecede nce  of the  AND/OR lo gic al  operators
T h efirst quer y i s equivalent  to   
WHE RE  pr o perty _id  = 1OR (pr o perty_ id = 2
  A ND pro p erty_id =  3 )

B ecause AND has hi g he r  precedence th an ORop e ra t o r
A:
Check Man ua l Her e  for Op e ra t o r  Pr e cedence
In yo ur first qu e rywherecl aus e  check  this  c o ndi tion 
prope rty_ id = 2 AN D prop e rty_id=  3 beca use of  AN D o pera t or  i s m or e  pr e ce den c e t hen OR O pe ra tor.In s e c o n d qu ery  whe re cl ause check fi rst  thi s  co ndtio n (pr oper ty _id =  1 ORprope rt y_id = 2) becau se b racket ha vemo repr ecede n ce the n o the r compa re oper a tor .Y o u rfirst query equiva le n t  t o
WHEREproper t y_ id = 1 OR ( pr ope rty_ i d  = 2   A ND  propert y_id = 3) 
 Q:

Ho wlow (a nd  fo r h ow lo n g) d oes th e temper ature need to be bef o re I need tow or r y  a b outcov ering my ou tdoo r  veg etab l egar d en?
I hav ea no utdoor vegetable ga rd en inSouth  Florida. The  garden co n s i sts of t hing s  l i ke tomatoes, p epper s, lettuce ,  peas, a nd sq uash. Ev erythingw a s starte d f rom  se eda b ou t 2 months ag o .  I d on 't have  an y veggi esyet  bu t p le nty of ta ll stems  w it hle ave s all over the  p lac e. 
It  gene r ally n evergets  b el o w f reezing he r e , bu twe  dohav esever al d a ysduringthe winte r w i th r el at ively l ow overnightlo ws, rangin gfro m high 3 0s to lo w 40s ºF (or 0–5 ºC). D a ytime h igh s aft er s uch eveni ngs  are t ypi c ally i n the50s a nd  60 s ºF (o r 10 –20  º C).
I'm to l d  Ishoul dcove r my ga rden with some pla s tic  or a sheet i n o rder t opro t ec t  it  f r omt h e cold. At what  point isth e  t emperature low  e nough ( and how  long does it  have tobe expect ed  tob e  th at low) be fore I n eed to ta k e the ti me to  do  so?
A: 

D iffer ent ve g eta bleshave d if ferent  temp er ature th resholds.
Peas, for exa mple,are v ery  hardy --  th e y c an tolera te h eavy frost . ( But  notthe bloss oms- -ift hesegetf rosted yo u  p rob a b ly  won't geta n y  po ds.)Kal e  and s pina ch can be planted in fall and su rviv e mon ths unde rseveral feet o f s no w snow tobe  eaten in t he sprin g( if th e deer  don't  eat th e m  f i rst).
_id =_1 OR_property_id = 2)
 _ _AND_property_id =_3

given_different results? 
And_how MySQL define_order in WHERE clause?

A:

Because_of the precedence_of_the AND/OR logical operators
The first query is equivalent to  
WHERE property_id = 1_OR_(property_id =_2
__  AND property_id =_3)

Because AND has higher precedence_than OR_operator

A:

Check Manual Here for Operator Precedence
In your first_query_where clause check_this condition 
property_id = 2 AND property_id = 3_because of AND operator is more_precedence then OR_Operator.
In_second_query where clause check_first this condtion (property_id = 1_OR property_id = 2) because bracket_have more precedence then other compare operator.
Your_first query equivalent to
WHERE property_id =_1 OR (property_id = 2
_ _ AND property_id = 3)

_Q:

How low (and_for how_long) does the_temperature need to be before I_need to worry_about covering my outdoor vegetable garden?

I_have_an outdoor vegetable_garden_in_South Florida._The garden consists_of_things like_tomatoes,_peppers, lettuce, peas, and squash. Everything_was_started from seed about 2 months ago._I don't have any_veggies_yet but plenty of_tall stems with leaves all_over the place.
It generally never gets_below freezing_here, but_we do have several days during the winter with relatively low_overnight lows, ranging from high 30s_to low 40s ºF_(or 0–5_ºC)._Daytime highs after_such_evenings are_typically in the 50s and 60s ºF_(or 10–20_ºC).
I'm told I should cover my_garden with some plastic_or_a sheet in order to protect_it from the cold. At what_point is the temperature low_enough_(and_how long does it have_to be expected to be that_low) before I_need to take the time to do_so?

A:

Different_vegetables have different temperature thresholds.
Peas, for_example,_are very hardy -- they can_tolerate_heavy_frost. (But not the blossoms_-- if these get frosted you_probably won't get any pods.) Kale and spinach can_be planted in_fall and survive months under_several_feet_of snow snow to be eaten in the spring (if_the deer_don't eat them_first).