The following operators can be used in the WHERE clause:OperatorDescriptionExample = Equal Try it > Greater than Try it < Less than Try it >= Greater than or equal Try it <= Less than or equal Try it <> Not equal. Note: In some versions of SQL this operator may be written as !=...
报错:ERROR: Query:[xxx] Get result failed: canceling statement due to user request 问题原因:查询被取消,通常是因为表被执行了DROP或TRUNCATE操作。 解决方法:可以通过HoloWeb Query洞察排查是否有冲突的DDL,详情请参见Query洞察。后期尽量避免Query执行过程中有DDL冲突任务。
// 解析 origin,返回 list<stmt> private List<StatementBase> analyze(String originStmt) throws AnalysisException, DdlException {LOG.debug("the originStmts are: {}", originStmt); // 使用 CUP&FLEX 生成的解析器解析语句 SqlScanner input = new SqlScanner(new StringReader(originStmt), ctx.getSession...
This SQL tutorial explains how to use the SQL WHERE clause with syntax and examples. The SQL WHERE clause is used to filter the results and apply conditions in a SELECT, INSERT, UPDATE, or DELETE statement.
IFboolean_expression statementELSEIFboolean_expression statement 3、WHILE、BREAK和CONTINUE语句 --WHILE 用来表示当某条件满足时,重复执行某语句或者语句块的情况 whileboolean_expression statement 4、DECLARE语句 --用来定义一个局部变量 ,可用select语句为该变量赋初值,这个变量必须用@开头,后面跟着一个标识符(合法)...
rewrite(whereClause_, analyzer_); // Also rewrite exprs in the statements of subqueries. List<Subquery> subqueryExprs = new ArrayList<>(); whereClause_.collect(Subquery.class, subqueryExprs); for (Subquery s: subqueryExprs) s.getStatement().rewriteExprs(rewriter); } if (havingClause_ != ...
You use query criteria in the WHERE clause of a SELECT statement. A WHERE clause has the following basic syntax: WHERE field = criterion For example, suppose that you want the telephone number of a customer, but you only remember that the customer's last name is Bagel. Instead of looking...
Can I UPDATE, then INSERT if no record updated? Can I use a COLLATE clause in a temp table definition? Can I use aggregate function within CASE? Can I use if statement in a table valued function? Can I use LEN or DATALENGTH in a WHERE clause? Can I use OUTER JOIN on 2 columns at...
Learn how to effectively use the SQL WHERE clause to filter records in your SQL queries. Enhance your database management skills with practical examples.
TheWHEREclause is used with theSELECT,UPDATE, andDELETE. However, you'll see the use of this clause with other statements in upcoming chapters. Syntax TheWHEREclause is used with theSELECTstatement to extract only those records that fulfill specified conditions. The basic syntax can be given wit...