SQL中的CASE WHEN使用 Case具有两种格式。简单Case函数和Case搜索函数。...如果使用Case函数,SQL代码如下: SELECT SUM(population), CASE country WHEN ‘中国’ THEN ‘亚洲’ WHEN ‘印度’ THEN ‘...但是那样增加消耗(两个Select部分),而且SQL语句会比较长。...三,在
This method allows you to performmore detailed and layered data analysisby using the result of one query as an input for another. Subqueries can be used in various parts of a SQL statement, including the SELECT, FROM, and WHERE clauses. Subqueries Syntax: SELECTcolumn1, (SELECTSUM(column2)...
Apache beam首先构建管道和类，然后开始在管道中运行数据，在这个阶段，你不能访问选项，这只是用于构建管...
Execute Buffer (as a single SQL statement) Yes Yes Syntax colored SQL editor Yes Yes Auto Completion (aka code completion, intellisense) Yes Yes Predefined and user defined editor templates Yes No Support for multiple SQL editors Yes Yes SQL formatter with extensive customiz...
SQL statementFor information, go toImport data from a database using native database query. In this version of native database query functionality, you need to use fully qualified table names in the formatDatabase.Schema.Table, for exampleSELECT * FROM DEMO_DB.PUBLIC.DEMO_TABLE. This option ...
Analysis How to use SQL Pivot How to Query JSON Object How to Calculate Cumulative Sum/Running Total How to Have Multiple Counts How to Write a Case Statement How to Use Coalesce How to Avoid Gaps in Data How to Import a CSV How to Get First Row Per Group How to Compare Two Values ...
The WHERE clause used to filter data. BigQuery Reader concatenates the values of thecolumn,table, andwhereparameters to form an SQL statement and executes the SQL statement to read data from the source table. For example, when you perform a test, you can set thewhereparameter toLIMIT 10. ...
The merge statement that dbt generates when the insert_overwrite strategy is selected looks something like:/* Create a temporary table from the model SQL*/create temporary table {{ model_name }}__dbt_tmp as ( {{ model_sql }});/* If applicable, determine the partitions to overwrite by ...
Out of the BigQuery INSERT and UPDATE commands, you must first learn the basic INSERT statement constructs to interact with the above table definitions. INSERT query follows the standard SQL syntax. The values that are being inserted should be used in the same order as the columns. The below ...
SQL statement For information, go to Import data from a database using native database query. In this version of native database query functionality, you need to use fully qualified table names in the format Database.Schema.Table, for example SELECT * FROM DEMO_DB.PUBLIC.DEMO_TABLE. This ...