select * from student where Name in (SELECT name from student GROUP BY name HAVING count(name) >1)
The most commonly used SQL command is SELECT statement. SQL SELECT statement is used to query or retrieve data from a table in the database. A query may retrieve information from specified columns or from all of the columns in the table. To create a simple SQL SELECT Statement, you must ...
Select the JOIN condition to use: 2.You JOIN the tablesgoalandeteamin an SQL statement. Indicate the list of column names that may be used in the SELECT line: 3.Select the code which shows players, their team and the amount of goals they scored against Greece(GRE). 4.Select the result...
SELECT column1, column2 FROM table1 UNION SELECT column1, column2 FROM table2 SELECT column1, column2 FROM table1 UNION ALL SELECT column1, column2 FROM table2 差集NOT IN SELECT * FROM table1 WHERE name NOT IN(SELECT name FROM table2) 交叉连接(CROSS JOIN-笛卡尔积) SELECT * FROM table...
FULL OUTER JOINThe FULL OUTER JOIN command returns all rows when there is a match in either left table or right table.The following SQL statement selects all customers, and all orders:SELECT Customers.CustomerName, Orders.OrderID FROM Customers FULL OUTER JOIN Orders ON Customers.CustomerID=...
SELECT--C.3o.object_typeAS[Type-of-Item], p.nameAS[Package], o.nameAS[Item], o.descriptionAS[Item-Description]FROMsys.dm_xe_objectsASoJOINsys.dm_xe_packagesASpONo.package_guid = p.guidWHEREo.object_typeIN('action','target','pred_source')AND( (o.capab...
SQL INNER JOIN The SQLINNER JOINstatement joins two tables based on a common column and selects rows that have matching values in these columns. Example -- join Customers and Orders tables with their matching fields customer_idSELECTCustomers.customer_id, Orders.itemFROMCustomersINNERJOINOrdersON...
进入check 方法进行 Statement 的遍历 /** * statement 过滤 只识别select 语句 * * @param statement * @throws SqlParseException */ privatevoidcheck(Statementstatement)throwsSqlParseException{ //如果根节点是查询节点 获取所有的孩子节点,深度优先搜索遍历 ...
The SQLJOINstatement is used to combine rows from two tables based on a common column and selects records that have matching values in these columns. Example -- join the Customers and Orders tables-- based on the common values of their customer_id columnsSELECTCustomers.customer_id, Customers...
以下SELECT 语句返回大约 1915 个行,每一行针对一个对象。 SQL SELECT--C.3o.object_typeAS[Type-of-Item], p.nameAS[Package], o.nameAS[Item], o.descriptionAS[Item-Description]FROMsys.dm_xe_objectsASoJOINsys.dm_xe_packagesASpONo.package_guid = p.guidWHEREo.object_typeIN('action','target'...