The following SQL statement will update the contactname to "Juan" for all records where country is "Mexico":Example UPDATE Customers SET ContactName='Juan' WHERE Country='Mexico'; Note: Be careful when updating records in a table! Notice the WHERE clause in the UPDATE statement. The WHERE ...
INSERT INTO employees (name, position) VALUES ('John Doe', 'Developer'); 2.3 UPDATE语句 (UPDATE Statement) UPDATE语句用于更新表中已有的数据。基本语法如下: UPDATE table_name SET column1 = value1 WHERE condition; 例如,更新“employees”表中某个员工的职位: UPDATE employees SET position = 'Senior...
UPDATEtable_name SETcolumn1=value1,column2=value2, ... WHEREcondition; Note:Be careful when updating records in a table! Notice theWHEREclause in theUPDATEstatement. TheWHEREclause specifies which record(s) that should be updated. If you omit theWHEREclause, all records in the table will be...
SQL Quick Reference From W3Schools« Previous Next Chapter » SQL StatementSyntax AND / OR SELECT column_name(s) FROM table_name WHERE condition AND|OR condition ALTER TABLE ALTER TABLE table_name ADD column_name datatype or ALTER TABLE table_name DROP COLUMN column_name AS (alias) ...
W3Schools SQL QuizSQL QUIZPoints: 25 out of 25 1. What does SQL stand for? You answered: Structured Query Language Correct Answer! 2. Which SQL statement is used to extract data from a database? You answered: SELECT Correct Answer! 3. Which SQL statement is used to update data in ...
Without parenthesis, the select statement will return all customers from Spain that starts with a "G",plusall customers that starts with an "R", regardless of the country value: Video: SQL AND Operator ❮ PreviousNext ❯ ★ +1
2)更新记录表里的记录值可以通过update命令进行更改，语法如下：UPDATE tablename SET field1 = value1...
You can get very helpful tutorials on SQL from www.w3schools.com/sql/. FlexSim's SQL parser supports a subset of the standard SQL language constructs. Listed below is the full set of SQL constructs supported by FlexSim's SQL parser: SELECT UPDATE FROM INNER JOIN Inner joins via comma-...
SQL StatementSyntax AND / OR SELECT column_name(s)FROM table_nameWHERE conditionAND|OR condition ALTER TABLE ALTER TABLE table_name ADD column_name datatype or ALTER TABLE table_name DROP COLUMN column_name AS (alias) SELECT column_name AS column_aliasFROM table_name or SELECT column_name...
SQL Select Statement on W3Schools.com Example Code: Get Column Headers from SQL Query with Database Connectivity Toolkit Other Support Options Ask the NI Community Collaborate with other users in our discussion forums Search the NI Community for a solution Request Support from an Engineer A valid...