SELECT b, a FROM (VALUES (1, 'a') )t(a, b) The example uses thevaluesclauseto produce a table with two rows and one column (of unknown name). One of the values isnull. To be able to refer to this column, and thus be able to apply an aggregate function upon it, the example...
product_nameVARCHAR(255),unit_priceDECIMAL(10,2));--创建客户表CREATETABLEcustomers(customer_idINTPRIMARYKEY,customer_nameVARCHAR(255),emailVARCHAR(255));--导入数据INSERTINTOcustomers(customer_id,customer_name,email)VALUES
value1, value2, value3, ...are the values to be inserted Example: Insert Row Into a Table In SQL, theINSERT INTOstatement is used to insert new row(s) into a database table. -- insert a row in the Customers tableINSERTINTOCustomers(customer_id, first_name, last_name, age, country...
Example: ANY in SQL SQL ALL Operator SQL ALL compares a value of the first table with all values of the second table and returns the row if there is a match with all values. It has the following syntax: SELECT column FROM table1 WHERE column OPERATOR ALL ( SELECT column FROM table2...
Example Explained SQL ANY and ALL ANYALL Examples Explained SQL CASE Examples Explained SQL Comments Single Line CommentsSingle Line Comments At The End Of a LineMulti-line Comments SQL Create DBSQL Drop DBSQL Backup DBSQL Create TableSQL Drop TableSQL Alter TableSQL ConstraintsSQL Not NullSQL ...
INSERT schema.TableName (Col1, Col2, Col3, etc.) VALUES (value1, value2, value3, etc ); In this tutorial, I will give an example of a basic insert along with several other examples using other methods to insert data to a SQL table. ...
INTO table_a (col1a, col2a, col3a, …) SELECT col1b, col2b, col3b, … FROM table_b WHERE table_b.col1 = x ORDER BY col1b; With the example above, we want to insert only the top 20 biggest orders: INSERT INTO sales.big_orders (id, full_name, address, total) ...
It turned out that many entries in the table 1 and table 2 had string_field column with NULL values. I thought that JOIN would keep records with NULL values because NULL is equal to NULL, isn’t it? Then I tried: 代码语言:javascript ...
VALUES [ROW]('row 1 column 1', 'row 1 column 2') , [ROW]('row 2 column 1', 'row 2 column 2') The optional keyword row is not widely supported but required by some products (see Compatibility). The result of this example is a 2×2 table holding the values as suggested by the...
Create Table Example with Simple Syntax In the code block below, we have the basic syntax for creating a table with 3 columns: CREATE TABLE TableName( columnName1 TYPE, columnName2 TYPE, columnName3 TYPE ); GO Here is a simple break-down of the syntax: ...