A: It ignores NULL values
B: Reversing the order of the intersected tables alters the result
C: The names of columns in all SELECT statements must be identical
D: The number of columns and data types must be identical for all SELECT statements in the query
举一反三
- Which statement is true regarding the INTERSECT operator?（） A: It ignores NULL values B: Reversing the order of the intersected tables alters the result C: The names of columns in all SELECT statements must be identical D: The number of columns and data types must be identical for all SELECT statements in the query&e
- Select the following true statements regarding the concept of "understanding."
- All of the following statements are true except one. Which statement is false?
- Select the following true statements regarding the concept of artificial intelligence.
- For the same nuclide, which character must be identical? () A: Proton number B: Neutron number C: Electrons number D: Energy state
内容
- 0
Select which of the following statements are true about ontology.
- 1
Select the following true statements regarding the concept of minimax rule for a zero sum game.
- 2
Which of the following statements will not compile A: if(true); B: if(true) {} C: if(true) {;} D: if(true) {;;} E: if(true); {}; F: All statements will compile.
- 3
In the Select statement of the SQL language, the clause that used to indicate the order of the query result is (). A: From B: While C: Group By D: Order By
- 4
Which of the following statements is correct ? (1) There are two types of stress, normal stress(σ) and shear stress(τ). (2) On one section, the normal stress(σ) and the shear stress(τ) must be perpendicular to each other. (3) On one section, all the normal stress(σ) must be equal in size and same in the direction. (4) On one section, all the shear stress(τ) must be parallel.