mysql - Joining Tables to Update -



mysql - Joining Tables to Update -

can update row? first time using left join update.

update comments r left bring together items on i.items_id = r.item_id left bring together master_cat c on c.cat_id = i.items_id set r.good = r.good + 1 i.item = '{$item}' , c.category = '{$cat}' , r.review = '{$review}';

it doesn't throw error, says 0 rows affected though have confirmed variables ok right data. (even if hard code data).

edit: have tried inner bring together well, , not work either.

edit 2: trying do, have these 2 queires , work fine. trying simplify code one. can done:

// query returns rate_id utilize "$review_id" in sec query. $query = " select r.rate_id comments r left bring together items on i.items_id = r.item_id left bring together master_cat c on c.cat_id = i.cat_id r.review = '{$review}' , i.item = '{$item}' , c.category = '{$cat}';"; $query = " update comments set = + 1 rate_id = '{$review_id}';";

your problem in update statement have mismatching bring together (cat_id items_id):

left bring together master_cat c on c.cat_id = i.items_id

while in select (that working), have bring together correctly:

left bring together master_cat c on c.cat_id = i.cat_id

mysql sql sql-update left-join

Comments

Post a Comment

Popular posts from this blog

javascript - mongodb won't find my schema method in nested container -

javascript - mongodb won't find my schema method in nested container - i trying access method of schema stored within mixed container. here situation : have cases model can many different things, have schema each of these things stored in "casecontent" mixed property. var caseschema = mongoose.schema({ casecontent : {}, object : {type:string, default : "null"}, collision : {type : boolean, default : false} }); the casecontent property filled model of 1 of schemas, 1 exemple : var treeschema = new mongoose.schema({ applecount : {type : number, default : 3} }); treeschema.methods.dostuff = function (data) { console.log('hey, listen'); homecoming true; }; then, want utilize method of schema original container : caseschema.methods.dostuff = function (data) { if (this.casecontent.dostuff !== undefined) { this.casecontent.dostuff(); console.log('it worked'); } else { ...
Read more

Hibernate criteria by a list of natural ids -

Hibernate criteria by a list of natural ids - i trying create hibernate criteria using list of natural ids. saw illustration here http://docs.jboss.org/hibernate/core/3.5/reference/en-us/html/querycriteria.html#query-criteria-naturalid shows illustration querying single record: session.createcriteria(user.class) .add(restrictions.naturalid() .set("name", "gavin") .set("org", "hb")); is there improve way create criteria list of natural ids illustration below? junction junction = restrictions.disjunction() .add(restrictions.naturalid() .set("name", "gavin") .set("org", "hb")) .add(restrictions.naturalid() .set("name", "jdoe") .set("org", "rh")); session.createcriteria(user.class) .add(junction); thanks. in experience, no. reason due limitations of sql in implementations. when seek phrase in sql gets...
Read more

ios - Lagging ScrollView with UIWebview inside -

ios - Lagging ScrollView with UIWebview inside - i have uiwebview within uiscrollview lot of content. when content loaded uiwebview big, starts lag. does know how solve issue? maintain in mind lags when uiwebview's height becomes considerably big. thank in advance! if read documentation on uiwebview , states not embed uiwebview uitableview or uiscrollview . doing leads unexpected behaviour, , think experiencing first hand. sorry bearer of bad news. update - specific warning apple docs: the documentation addresses issue specifically. important: should not embed uiwebview or uitableview objects in uiscrollview objects. if so, unexpected behavior can result because touch events 2 objects can mixed , wrongly handled. apple reference on uiwebview . update 2: after doing few searches (search link, same posted in comments), came across this answer, may provide insight. monitors content offset in both uiscrollview , uiwebview via delegates, , cle...
Read more