CONDITIONAL 非保留 CONDITION_NUMBER 非保留 非保留 非保留 CONFIGURATION 非保留 CONFLICT 非保留 CONNECT 非保留 保留 保留 保留 CONNECTION 非保留 非保留 非保留 保留 CONNECTION_NAME 非保留 非保留 非保留 CONNECT_BY_ROOT 保留 CONSTRAINT 保留 保留 保留 保留 CONSTRAINTS 非保留 非保留 非保留 保留 CON...
将SQL 解析为 Statement 对象,然后检查其是否为查询类 SQL; 获取SQL 的 from 语句,并判断查询的表是否为我们要拦截的表; 解析where 语句: 若原本没有任何条件,则为其生成一个 where t.tenant_id = xxx 的条件; 如果原本已经有条件了,则为其在最后拼接 and t.tenant_id = xxx 的条件; 这里我们针对这个...
SQL---CASE WHEN条件表达式(conditional statement) CASE表达式是用来判断条件的,条件成立时返回某个值,条件不成立时返回另一个值。 语法: CASEWHENComparsionConditionTHENresultWHENComparsionConditionTHENresultELSEotherEND (注:各分支返回的数据类型需一致。) (注:when子句一定要有排他性,因为当when子句为真时,剩余...
operators.conditional.AndExpression; import net.sf.jsqlparser.expression.operators.conditional.OrExpression; import net.sf.jsqlparser.expression.operators.relational.ComparisonOperator; import net.sf.jsqlparser.schema.Column; import net.sf.jsqlparser.statement.select.Join; import net.sf.jsqlparser....
Both the DECODE statement and the CASE expression perform conditional tests. When the value in test_value matches any following expression, the related value is returned. If no match is found, the default_value is returned. If no default_value is specified, both DECODE and CASE return NULL if...
SQL_TIMESTAMP、SQL_TINYINT、 SQL_TSI_DAY、SQL_TSI_FRAC_SECOND、SQL_TSI_HOUR、SQL_TSI_MICROSECOND、SQL_TSI_MINUTE、SQL_TSI_MONTH、 SQL_TSI_QUARTER、 SQL_TSI_SECOND、SQL_TSI_WEEK、SQL_TSI_YEAR、SQL_VARBINARY、SQL_VARCHAR、STATE、STATEMENT、STRING_AGG、STRUCTURE、STYLE、SUBCLASS_ORIGIN、...
Is there a way to use a conditional where clause Is there a way to use aliases in a calculation? Is there a work-around to create indexes for a view defined by a sub-query, derived table, or CTE? Is there anyway to rollback single T-SQL in SQL Server Management Studio? Is there ...
Start Now Lesson 13 SQL NOT Use the SQL NOT operator to select rows for which a certain conditional statement is false. Start Now Lesson 14 SQL ORDER BY See code and examples of using SQL ORDER BY to sort data. Start Now Intermediate SQL ...
The conditional behavior described for the MERGE statement works best when the two tables have a complex mixture of matching characteristics. For example, inserting a row if it doesn't exist, or updating a row if it matches. When simply updating one table based on the rows of another table,...
问如何使用条件语句在Hive/SQL中执行(或绕过)代码块？EN客户需求是咨询如何用SQL结合decode函数实现条件...