select distinct id, value from t1; 字段表中可以使用条件结果语句case。 case valuewhen x/cond1 then value1when y/cond2 then value2when z/cond3 then value3else nullend [ , ]create table y( f int );insert into y values(1);
This SQLite tutorial explains how to use the SQLite WHERE clause with syntax and examples. Description The SQLite WHERE clause is used to filter the results from a SELECT, INSERT, UPDATE, or DELETE statement. Syntax The syntax for the WHERE clause in SQLite is: WHERE conditions; Parameters or...
ORDER BY clause that is part of a SELECT statement may be assigned a collation sequence to be used for the sort operation explicitly. In this case the explicit collation sequence is always used. Otherwise, if the expression sorted by an ORDER BY clause is a column, then the default collatio...
SQLite COMMIT Statement: COMMIT; SQLite CREATE INDEX Statement Syntax: CREATE INDEX index_name ON table_name ( column_name COLLATE NOCASE ); SQLite CREATE UNIQUE INDEX Statement Syntax: CREATE UNIQUE INDEX index_name ON table_name ( column1, column2,...columnN); SQLite CREATE TABLE Statement ...
You can also request slices of rows, in which case Peewee returns a corresponding Select query, which can be iterated over. Below are some examples: >>> KV['k0'] = 'v0' >>> print(KV['k0']) 'v0' >>> data = [{'key': 'k%d' % i, 'value': 'v%d' % i} for i in ...
ORDER BYclause that is part of a SELECT statement may be assigned a collation sequence to be used for the sort operation explicitly. In this case the explicit collation sequence is always used. Otherwise, if the expression sorted by an ORDER BY clause is a column, then the default collation...
Examples Now let’s see a different example of SQLite extension as follows. create table jsn_tre(number any, value any, dept text, item any, p_id integer, path text, json JSON HIDDEN, root text hidden); Explanation In the above example, we use a create table statement to create a new...
Examples Creating a table and inserting data Getting a single row Getting many rows Inserting rows Updating rows Prepared statement each() Get the driver instance Closing the database ES6 tagged template strings Migrations Typescript tricks Import interfaces from sqlite ...
Now, let’s insert a new student and run the function LAST_INSERT_ROWID() again after the insert statement, like this: INSERT INTO Students VALUES(11, 'guru', 1, '1998-10-12'); SELECT LAST_INSERT_ROWID(); This will give you: ...
宏的具体形式如下: #define testcase(X) 但是在需要统计覆盖率的版本里,testcase() 宏按给予的参数的真值来生成对应的代码。在测试过程中,会检查所有产生分支的条件为 true 和false 时的情况。这时 testcase() 就派上用场了,比如,检验是否测试到边界值。 testcase( a==b );...