大约有 44,000 项符合查询结果（耗时：0.0270秒） [XML]
Linq to SQL how to do “where [column] in (list of values)”
...ing the method in Jon Skeet's answer, but another one occurred to me using Concat. The Concat method performed slightly better in a limited test, but it's a hassle and I'll probably just stick with Contains, or maybe I'll write a helper method to do this for me. Either way, here's another option if ...
ORA-00979 not a group by expression
...n in scope, but not group by it (assuming these are numbers, otherwise use CONCAT)
SELECT MAX(unique_id_col) AS unique_id_col, COUNT(1) AS cnt
FROM yourTable GROUP BY col_A, (unique_id_col*0 + col_A);
share
|
...
Truncate all tables in a MySQL database in one command?
...
truncate multiple database tables on Mysql instance
SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';')
FROM INFORMATION_SCHEMA.TABLES where table_schema in ('db1_name','db2_name');
Use Query Result to truncate tables
Note:
may be you will get this error:
...
Add characters to a string in Javascript
...r Loop characters to an empty string. I know that you can use the function concat in Javascript to do concats with strings
...
Javascript reduce on array of objects
...dyFound = (words, word) => words.includes(word)
? words
: words.concat(word);
const deduplicatedWords = aBunchOfWords.reduce(skipIfAlreadyFound, []);
Providing a count of all words found:
const incrementWordCount = (counts, word) => {
counts[word] = (counts[word] || 0) + 1;
ret...
Why is string concatenation faster than array join?
Today, I read this thread about the speed of string concatenation.
9 Answers
9
...
Increment value in mysql update query
...
Concatenating user data as demonstrated into an SQL query is a major SQL injection risk.
– trognanders
Nov 6 '15 at 1:20
...
How do I configure different environments in Angular.js?
...st',
'ngconstant:production',
'useminPrepare',
'concurrent:dist',
'concat',
'copy',
'cdnify',
'ngmin',
'cssmin',
'uglify',
'rev',
'usemin'
]);
So running grunt server will generate a config.js file in app/scripts/ that looks like
"use strict";
angular.module("config", []).co...
pandas three-way joining multiple dataframes on columns
...dataframes). It's worth noting that if your join keys are unique, using pd.concat will result in simpler syntax: pd.concat([df.set_index('name') for df in dfs], axis=1, join='inner').reset_index(). concat is also more versatile when dealing with duplicate column names across multiple dfs (join isn't...
How to get the first and last date of the current year?
...
To get the first and the last day of the year, one can use the CONCAT function. The resulting value may be cast to any type.
CONCAT(YEAR(Getdate()),'-01-01') FirstOfYear,
CONCAT(YEAR(GETDATE()),'-12-31') LastOfYear
...