concat

问题 This question already has answers here : how to concatenate more than two columns in plsql developer? [duplicate] (2 answers) Closed last year . it does not runing,please show me where I have a mistake? SELECT CONCAT(FIRST_NAME,',',LAST_NAME) as full_name FROM EMPLOYEES; 回答1: Use ANSI SQL's || instead to concat: SELECT FIRST_NAME || ',' || LAST_NAME as full_name FROM EMPLOYEES; ( CONCAT() function takes two arguments only.) 回答2: Concat only expects two Parameter, so you have to use nested

问题 NOTE: I initially thought my problem had to do with CONCAT , but since the exact error persisted even when I completely eliminated CONCAT from my query, I figured I should completely over-write of my original post. I'm trying to set a trigger, and keep getting a Syntax Error. When I tried this CREATE TRIGGER set_aka_name BEFORE INSERT ON sandbox_person FOR EACH ROW BEGIN IF (NEW.aka IS NULL) THEN SET NEW.aka = 'test value'; END IF; END ...I got this error: 1064 - You have an error in your SQL

问题 In my old site, this problem does not exist. But after I have changed the server and imported the data base, this message appears. The PHP version is 5.3 and this is the code: $sql = "SELECT * FROM movcaixa WHERE data BETWEEN '$data1' AND '$data2' AND empresa = $empresa ORDER BY data ASC"; $resMovCaixa = mysql_query($sql, $cnn) or die('Falha na conexão com o banco de dados'); $sql = "SELECT cp.id AS codigo, CONCAT('Pagamento ref. a ', des.descricao, ', conforme doc. nº ', cp.documento) AS

问题 I have converted pdf into a jpeg using go-fitz which gives me a list of jpeg in a directory. I am reading a list of images from a directory and then trying to combine them into a single image. The image is of type jpeg and works partially if I just use page 1 and 2 using the index. I want to stitch the pdf page jpeg images back into a single jpeg image. The end result of the code generate a single image with the first page. Golang how to concatenate/append images to one another If I use image

问题 Here the code is for concat two video and adding watermark to that video but this code working perfectly in local but not in server. The code is as follows: $videoFileName = rand('111111', '999999').'_'.time().'.'.$request->file('video1')->getClientOriginalExtension(); $intermediateVideo1 = rand('1111111', '9999999').'_'.time().'.ts'; $intermediateVideo2 = rand('1111111', '9999999').'_'.time().'.ts'; $concatVideoFileName = rand('111111', '999999').'_'.time().'.'.$request->file('video1')-

问题 I have question relate in pandas dataframe merge. Plz, below data.. Rating csv UserID ContentID Rating U-1 C-1 3 U-1 C-2 4 U-3 C-3 1 U-5 C-1 5 Content csv Title ContentID Language T-1 C-1 EN T-2 C-2 EN T-3 C-3 EN User csv UserID Age Gender U-1 10 1 U-2 20 0 U-3 30 1 U-4 40 0 U-5 50 1 U-6 60 0 U-7 70 1 I want Result UserID ContentID Rating Title Language Age Gender U-1 C-1 3 T-1 EN 10 1 U-1 C-2 4 T-2 EN 10 1 U-1 C-3 NAN T-3 EN 10 1 U-2 C-1 NAN T-1 EN 20 0 U-2 C-2 NAN T-2 EN 20 0 U-2 C-3 NAN T

问题 I am trying to create a trigger to write logs when rows in x table have been edited. This is the current query.. CREATE TRIGGER users_update_trigger AFTER UPDATE ON users FOR EACH ROW BEGIN INSERT INTO users_backlog (user_id, description, datetime) VALUES (user_id, CONCAT('modified from ', OLD.value, ' to ', NEW.value), CURTIMESTAMP()); END The console returns the following error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the

问题 my question is very similar to Merge pandas dataframe, with column operation but it doesn't answer my needs. Let's say I have two dataframes such as (note that the dataframe content could be float numbers instead of booleans): left = pd.DataFrame({0: [True, True, False], 0.5: [False, True, True]}, index=[12.5, 14, 15.5]) right = pd.DataFrame({0.7: [True, False, False], 0.5: [True, False, True]}, index=[12.5, 14, 15.5]) right 0.5 0.7 12.5 True True 14.0 False False 15.5 True False left 0.0 0.5

问题 I need to combine two text fields in the MySQL Database table into One, So I have used the Following SQL script to do it. Table: tbl_newsitems Combine: Need to combine the text in the 'ni_text' with the same 'news_id' Table Layout: Code used to combine the text: SELECT news_id , GROUP_CONCAT( ni_text SEPARATOR ' ') FROM tbl_newsitems GROUP BY news_id ; But it won't display the full (Complete) text in the result section. The CONCAT field is trimmed and missing some text. The default Data type

问题 I've got a problem, regarding gulp. I decided to automate the process of how the source and styles are compiled into a single file, so I decided to use gulp for that purpose. However, it doesn't want to overwrite the application.js file that I'm creating from all .js files in my Project. The strange thing is that it actually overwrites the compiled css files, that is generated from all .less files in the Project. Here is how my Project file structure looks like: . ├── gulpfile.js └── apps ├──