MySQL: How to remove value matching another column from beginning or end of column? -

-

i'm parsing through tv program data stored in sql table, , data has 2 columns, 1 program title whole (e.g. series name) , 1 program's subtitle (e.g. individual episode title). program subtitle quite contains series name within well, either @ beginning of string or @ end, or both, in following formats:

e.g. title of "horizon" , correct subtitle of "the £10 million challenge", following possible combinations value in subtitle field:

  • horizon: £10 million challenge
  • the £10 million challenge: horizon
  • horizon: £10 million challenge: horizon

instead of colon followed space, separator space hyphen space so: "horizon - £10 million challenge - horizon"

so want each row in table, if subtitle contains value in title column @ beginning of subtitle (followed ': ' or ' - ') or if value @ end of column (preceded ': ' or ' - ') or both, update subtitle remove prefix or suffix. can or point me in right direction? i'm unsure start.

why want title name in subtitle field?

i think should extract actual name , want it. think requires massive case statement:

update table t     set subtitle = (case when subtitle concat(title, ':%', title)                          trim(substring_index(substring_index(subtitle, ':', 2), ':', -1)))                          when subtitle concat(title, '-%', title)                          trim(substring_index(substring_index(subtitle, '-', 2), '-', -1)))                          when subtitle concat('%:', title)                          trim(substring_index(subtitle, ':', 1))                          when subtitle concat('%-', title)                          trim(substring_index(subtitle, '-', 2))                          else subtitle                    end)

test out in select first. also, won't work in cases if subtitle has hyphens or colons in name.


Comments

Post a Comment

Popular posts from this blog

python - TypeError: start must be a integer -

-
i trying draw 5 turtles, getting typeerror on line 25. here code: import turtle wn = turtle.screen() redrose = turtle.turtle() color = input("what background color be?") fillcolor_f = input("what color of rose be?") redrose.hideturtle() redrose.speed(30) redrose.penup() redrose.left(180) redrose.forward(175) redrose.right(90) redrose.forward(30) redrose.right(90) redrose.pendown() def drawrose(red): redrose.color("pink") redrose.fillcolor(fillcolor_f) redrose.fill(true) in range(red): redrose.forward(i) redrose.right(49) in range(5): drawrose(redrose) redrose.penup() redrose.forward(350) redrose.right(144) redrose.pendown() redrose.fill(false) drawrose(50) wn.bgcolor(color) i trying draw 5 roses, produces errors. doing in interactivepython.org. you recursively calling drawrose wrong parameter. on line 23 ( for in range(red): ) expect red integer...
Read more

c# - DevExpress RepositoryItemComboBox BackColor property ignored -

-
i have following code almost works properly; private void cbstatus_drawitem(object sender, listboxdrawitemeventargs e) { string item = e.item string; if (item != null) { switch (item) { case "1": e.appearance.forecolor = color.green; e.appearance.backcolor = color.green; break; case "2": e.appearance.forecolor = color.orange; e.appearance.backcolor = color.orange; break; case "3": e.appearance.forecolor = color.red; e.appearance.backcolor = color.red; break; } } } when dropdown shown, items forecolor correct, backcolor remains whatever backcolor of theme is; i.e. if i've got set dark theme, backcolor dark, cells in gridview, rather being green/orange/red. i've tried setting e.appearance.options.usebackcolor trying set e....
Read more

django - Creating multiple model instances in DRF3 -

-
1) create multiple model instances 1 api call, asked here: how create multiple model instances django rest framework? tried solution named in link, no success. i trying upload multiple files in 1 api call. result: files uploaded (only once overwrote perform_create) 1 instance created (if send 2 files, latter created instance). my code: class fileuploadserializer(serializers.modelserializer): def __init__(self, *args, **kwargs): many = kwargs.pop('many', true) super(fileuploadserializer, self).__init__(many=many, *args, **kwargs) class meta: model = fileupload read_only_fields = ('created', 'datafile', 'owner') class fileuploadviewset(viewsets.modelviewset): queryset = fileupload.objects.all() serializer_class = fileuploadserializer parser_classes = (multipartparser, formparser, ) def perform_create(self, serializer): file_list = self.request.data.getlist('file') ...
Read more